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Temporal range: Early Pleistocene – Recent
|A Bengal tiger (P. tigris tigris) in India's Jim Corbett National Park|
|Tiger's historic range in about 1850 (pale yellow) and in 2006 (in green).|
Tigris striatus Severtzov, 1858
Temporal range: Early Pleistocene – Recent
|A Bengal tiger (P. tigris tigris) in India's Jim Corbett National Park|
|Tiger's historic range in about 1850 (pale yellow) and in 2006 (in green).|
Tigris striatus Severtzov, 1858
The tiger (Panthera tigris) is the largest cat species, reaching a total body length of up to 3.3 m (11 ft) and weighing up to 306 kg (675 lb). Its most recognizable feature is a pattern of dark vertical stripes on reddish-orange fur with a lighter underside. It has exceptionally stout teeth, and the canines are the longest among living felids with a crown height of as much as 74.5 mm (2.93 in) or even 90 mm (3.5 in). In zoos, tigers have lived for 20 to 26 years, which also seems to be their longevity in the wild. They are territorial and generally solitary but social animals, often requiring large contiguous areas of habitat that support their prey requirements. This, coupled with the fact that they are indigenous to some of the more densely populated places on Earth, has caused significant conflicts with humans.
Tigers once ranged widely across Asia, from Turkey in the west to the eastern coast of Russia. Over the past 100 years, they have lost 93% of their historic range, and have been extirpated from southwest and central Asia, from the islands of Java and Bali, and from large areas of Southeast and Eastern Asia. Today, they range from the Siberian taiga to open grasslands and tropical mangrove swamps. The remaining six tiger subspecies have been classified as endangered by IUCN. The global population in the wild is estimated to number between 3,062 and 3,948 individuals, down from around 100,000 at the start of the 20th century, with most remaining populations occurring in small pockets isolated from each other. Major reasons for population decline include habitat destruction, habitat fragmentation and poaching. The extent of area occupied by tigers is estimated at less than 1,184,911 km2 (457,497 sq mi), a 41% decline from the area estimated in the mid-1990s.
Tigers are among the most recognisable and popular of the world's charismatic megafauna. They have featured prominently in ancient mythology and folklore, and continue to be depicted in modern films and literature. Tigers appear on many flags, coats of arms, and as mascots for sporting teams. It is the national animal of Bangladesh (specifically the Bengal Tiger), India, Vietnam, Malaysia (specifically the Malayan tiger) and South Korea.
In 1758, Linnaeus first described the species in his work Systema Naturae under the scientific name Felis tigris. In 1929, the British taxonomist Reginald Innes Pocock subordinated the species under the genus Panthera using the scientific name Panthera tigris.
The word Panthera is probably of Oriental origin and retraceable to the Ancient Greek word panther, the Latin word panthera, the Old French word pantere, most likely meaning "the yellowish animal", or from pandarah meaning whitish-yellow. The derivation from Greek pan- ("all") and ther ("beast") may be folk etymology that led to many curious fables.
The oldest remains of a tiger-like cat, called Panthera palaeosinensis, have been found in China and Java. This species lived about 2 million years ago, at the beginning of the Pleistocene, and was smaller than a modern tiger. The earliest fossils of true tigers are known from Java, and are between 1.6 and 1.8 million years old. Distinct fossils from the early and middle Pleistocene were also discovered in deposits in China and Sumatra. A subspecies called the Trinil tiger (Panthera tigris trinilensis) lived about 1.2 million years ago and is known from fossils found at Trinil in Java.
Tigers first reached India and northern Asia in the late Pleistocene, reaching eastern Beringia (but not the American Continent), Japan, and Sakhalin. Fossils found in Japan indicate the local tigers were, like the surviving island subspecies, smaller than the mainland forms. This may be due to the phenomenon in which body size is related to environmental space (see insular dwarfism), or perhaps the availability of prey. Until the Holocene, tigers also lived in Borneo, as well as on the island of Palawan in the Philippines.
Tigers have muscular bodies with particularly powerful forelimbs and large heads. The pelage coloration varies between shades of orange or brown with white ventral areas and distinctive black stripes. Their faces have long whiskers, which are especially long in males. The pupils are circular with yellow irises. The small, rounded ears have black markings on the back, surrounding a white spot. These spots, called ocelli, play an important role in intraspecific communication.
The pattern of stripes is unique to each animal, and these unique markings can be used by researchers to identify individuals (both in the wild and captivity), in much the same way as fingerprints are used to identify humans. The function of stripes is likely camouflage, serving to help tigers conceal themselves amongst the dappled shadows and long grass of their environments as they stalk their prey. The stripe pattern is also found on the skin of the tiger. If a tiger were to be shaved, its distinctive camouflage pattern would be preserved.
Tigers are the most variable in size of all big cats, even more so than leopards and much more so than lions. The Bengal, Caspian and Siberian tiger subspecies represent the largest living felids, and rank among the biggest felids that ever existed. An average adult male tiger from Northern India or Siberia outweighs an average adult male lion by around 45.5 kg (100 lb). Females vary in length from 200 to 275 cm (79 to 108 in), weigh 65 to 167 kg (143 to 368 lb) with a greatest length of skull ranging from 268 to 318 mm (10.6 to 12.5 in). Males vary in size from 250 to 390 cm (98 to 154 in), weigh 90 to 306 kg (198 to 675 lb) with a greatest length of skull ranging from 316 to 383 mm (12.4 to 15.1 in). Body size of different populations seems to be correlated with climate—Bergmann's rule—and can be explained by thermoregulation. Large male Siberian tigers can reach a total length of more than 3.5 m (11.5 ft) "over curves", 3.3 m (10.8 ft) "between pegs" and a weight of 306 kg (675 lb). This is considerably larger than the size reached by the smallest living tiger subspecies, the Sumatran tiger, which reaches a body weight of 75 to 140 kg (165 to 309 lb). Of the total length of a tiger, the tail comprises 0.6 to 1.1 m (2.0 to 3.6 ft). At the shoulder, tigers may variously stand 0.7 to 1.22 m (2.3 to 4.0 ft) tall. The current record weight, per the Guinness Book of World Records, for a wild tiger was 389 kg (858 lb) for a Bengal tiger shot in 1967, though its weight may have been boosted because it had eaten a water buffalo the previous night.
Tigresses are smaller than the males in each subspecies, although the size difference between male and female tigers tends to be more pronounced in the larger tiger subspecies, with males weighing up to 1.7 times more than the females. In addition, male tigers have wider forepaw pads than females. Biologists use this difference in tracks to determine gender. The skull of the tiger is very similar to that of the lion, though the frontal region is usually not as depressed or flattened, with a slightly longer postorbital region. The skull of a lion has broader nasal openings. However, due to the amount of skull variation in the two species, usually, only the structure of the lower jaw can be used as a reliable indicator of species.
There are 9 subspecies of tiger, three of which are extinct. Their historical range in Bangladesh, Siberia, Iran, Afghanistan, India, China, and southeast Asia, including three Indonesian islands is severely diminished today. The surviving subspecies, in descending order of wild population, are:
Hybridisation among the big cats, including the tiger, was first conceptualised in the 19th century, when zoos were particularly interested in the pursuit of finding oddities to display for financial gain. Lions have been known to breed with tigers (most often the Amur and Bengal subspecies) to create hybrids called ligers and tigons. Such hybrids were once commonly bred in zoos, but this is now discouraged due to the emphasis on conserving species and subspecies. Hybrids are still bred in private menageries and in zoos in China.
The liger is a cross between a male lion and a tigress. Because the lion sire passes on a growth-promoting gene, but the corresponding growth-inhibiting gene from the female tiger is absent, ligers grow far larger than either parent. They share physical and behavioural qualities of both parent species (spots and stripes on a sandy background). Male ligers are sterile, but female ligers are often fertile. Males have about a 50% chance of having a mane, but, even if they do, their manes will be only around half the size of that of a pure lion. Ligers are typically between 10 and 12 feet in length, and can weigh between 800 and 1,000 pounds or more.
The less common tigon is a cross between the lioness and the male tiger.
A well-known allele produces the white tiger, an animal which is rare in the wild but bred in some zoos due to its popularity. Breeding of white tigers will often lead to inbreeding as the trait is recessive. Many initiatives have taken place in white and orange tiger mating in an attempt to remedy the issue, often mixing subspecies in the process. Such inbreeding has led to white tigers having a greater likelihood of being born with physical defects, such as cleft palates and scoliosis (curvature of the spine). Furthermore, white tigers are prone to having crossed eyes (strabismus). Even apparently healthy white tigers generally do not live as long as their orange counterparts. Records of white tigers were first made in the early 19th century. They can only occur when both parents carry the rare allele found in white tigers. An estimated one in 10,000 natural tiger births are white tigers. The white tiger is not a separate sub-species, but only a colour variation; since the only white tigers to have been observed in the wild have been Bengal tigers (and all white tigers in captivity are at least part Bengal), the recessive gene that causes the white colouring is commonly thought to be carried only by Bengal tigers. They are not in any way more endangered than tigers are generally, this being a common misconception. Another misconception is white tigers are albinos, despite pigment being evident in the white tiger's stripes. They are distinct not only because of their white fur, but also their blue eyes.
In addition, another recessive gene may create a very unusual "golden" or "golden tabby" colour variation, sometimes known as "strawberry". Golden tigers have light-gold fur, pale legs, and faint orange stripes. Their fur tends to be much thicker than normal. Extremely few golden tigers are kept in captivity, around 30 in all. Like white tigers, golden tigers are invariably at least part Bengal. Some golden tigers carry the white tiger gene, and when two such tigers are mated, they can produce some stripeless white offspring. Both white and golden tigers tend to be larger than average Bengal tigers.
No black tiger has been authenticated, with the possible exception of one dead specimen examined in Chittagong in 1846. There are unconfirmed reports of a "blue" or slate-coloured tiger, the Maltese tiger. Largely or totally black tigers are assumed, if real, to be intermittent mutations rather than distinct species.
In the past, tigers were found throughout Asia, from the Caucasus and the Caspian Sea to Siberia and the Indonesian islands of Java, Bali and Sumatra. During the 20th century, tigers have been extirpated in western Asia and became restricted to isolated pockets in the remaining parts of their range. Today, their fragmented and partly degraded range extends from India in the west to China and Southeast Asia. The northern limit of their range is close to the Amur River in southeastern Siberia. The only large island inhabited by tigers today is Sumatra.
Tigers were extirpated on the island of Bali in the 1940s, around the Caspian Sea in the 1970s, and on Java in the 1980s. Loss of habitat and the persistent killing of tigers and tiger prey precipitated these extirpations, a process that continues to leave forests devoid of tigers and other large mammals across South and Southeast Asia. Since the beginning of the 20th century, their historical range has shrunk by 93%. In the decade from 1997 to 2007, the estimated area known to be occupied by tigers has declined by 41%.
Tigers can occupy a wide range of habitat types, but will usually require sufficient cover, proximity to water, and an abundance of prey. Bengal tigers live in many types of forests, including wet, evergreen, and the semievergreen of Assam and eastern Bengal; the swampy mangrove forest of the Ganges Delta; the deciduous forest of Nepal, and the thorn forests of the Western Ghats. In various parts of their range they inhabit or have inhabited additionally partially open grassland and savanna as well as taiga forests and rocky habitats. Compared to the lion, the tiger prefers denser vegetation, for which its camouflage colouring is ideally suited, and where a single predator is not at a disadvantage compared with the multiple felines in a pride. A further habitat requirement is the placement of suitably secluded den locations, which may consist of caves, large hollow trees, or dense vegetation.
Adult tigers lead solitary lives and congregate only on an ad hoc and transitory basis when special conditions permit, such as plentiful supply of food. They establish and maintain home ranges. Resident adults of either sex tend to confine their movements to a definite territory, within which they satisfy their needs, and in the case of tigresses, those of their growing cubs. Those sharing the same ground are well aware of each other's movements and activities.
The size of a tiger's home range mainly depends on prey abundance, and, in the case of male tigers, on access to females. A tigress may have a territory of 20 km2 (7.7 sq mi), while the territories of males are much larger, covering 60 to 100 km2 (23 to 39 sq mi). The range of a male tends to overlap those of several females.
Tigers are strong swimmers, and are often found bathing in ponds, lakes, and rivers. Among fellow big cats, only the jaguar shares with the tiger a similar fondness for and capability in the water. They may also cross rivers up to 6 to 7 km (3.7 to 4.3 mi) across and can swim a distance of up to 29 km (18 mi) in a day. During the extreme heat of the day, they often cool off in pools. They are able to carry prey through or capture it in the water.
The relationships between individuals can be quite complex, and apparently tigers follow no set "rule" with regards to territorial rights and infringing territories. For instance, although for the most part tigers avoid each other, both male and female tigers have been documented sharing kills, usually with others of the opposite sex, or cubs. George Schaller observed a male tiger share a kill with two females and four cubs. Females are often reluctant to let males near their cubs, but Schaller saw these females made no effort to protect or keep their cubs from the male, suggesting the male might have been the sire of the cubs. In contrast to male lions, male tigers will allow the females and cubs to feed on the kill first. Furthermore, tigers seem to behave relatively amicably when sharing kills, in contrast to lions, which tend to squabble and fight. Unrelated tigers have also been observed feeding on prey together. This quotation is from Stephen Mills' book Tiger, as he describes an event witnessed by Valmik Thapar and Fateh Singh Rathore in Ranthambhore National Park:
A dominant tigress they called Padmini killed a 250 kg (550 lb) male nilgai – a very large antelope. They found her at the kill just after dawn with her three 14-month-old cubs and they watched uninterrupted for the next ten hours. During this period the family was joined by two adult females and one adult male – all offspring from Padmini's previous litters and by two unrelated tigers, one female the other unidentified. By three o'clock there were no fewer than nine tigers round the kill.
When young female tigers first establish a territory, they tend to do so fairly close to their mother's area. The overlap between the female and her mother's territory tends to wane with increasing time. Males, however, wander further than their female counterparts, and set out at a younger age to mark out their own area. A young male will acquire territory either by seeking out a range devoid of other male tigers, or by living as a transient in another male's territory until he is old and strong enough to challenge the resident male. The highest mortality rate (30–35% per year) amongst adult tigers occurs for young male tigers which have just left their natal area, seeking out territories of their own.
Male tigers are generally more intolerant of other males within their territories than females are of other females. For the most part, however, territorial disputes are usually solved by displays of intimidation, rather than outright aggression. Several such incidents have been observed, in which the subordinate tiger yielded defeat by rolling onto its back, showing its belly in a submissive posture. Once dominance has been established, a male may actually tolerate a subordinate within his range, as long as they do not live in too close quarters. The most violent disputes tend to occur between two males when a female is in oestrus, and may result in the death of one of the males, although this is a rare occurrence.
To identify his territory, the male marks trees by spraying of urine and anal gland secretions, as well as marking trails with scat. Males show a grimacing face, called the Flehmen response, when identifying a female's reproductive condition by sniffing her urine markings. Like the other Panthera cats, tigers can roar. Tigers will roar for both aggressive and nonaggressive reasons. Other tiger vocal communications include moans, hisses, growls, and chuffs.
Tigers have been studied in the wild using a variety of techniques. The populations of tigers were estimated in the past using plaster casts of their pugmarks. This method was criticized as being inaccurate. Attempts were made to use camera trapping instead. Newer techniques based on DNA from their scat are also being evaluated. Radio collaring has also been a popular approach to tracking them for study in the wild.
In the wild, tigers mostly feed on large and medium-sized animals, with most studies indicating a preference for native ungulates weighing 90 kg (200 lb) at a minimum. Sambar, chital, barasingha, wild boar, gaur, nilgai and both water buffalo and domestic buffalo, in descending order of preference, are the tiger's favoured prey in India. Sometimes, they also prey on other predators, including other large species, such as dogs, leopards, pythons, sloth bears, and crocodiles. In Siberia, the main prey species are manchurian wapiti and wild boar (the two species comprising nearly 80% of the prey selected) followed by sika deer, moose, roe deer, and musk deer. In Sumatra, sambar, muntjac, wild boar, and Malayan tapir are the predominant prey. In the former Caspian tiger's range, prey included saiga antelope, camels, Caucasian wisent, yak, and wild horses. Like many predators, they are opportunistic and will eat much smaller prey, such as monkeys, peafowl, other large, ground-based birds, hares, porcupines, and fish.
Adult elephants are too large to serve as common prey, but conflicts between tigers and elephants, with the huge elephant typically dominating the predator, do sometimes take place. A case where a tiger killed an adult Indian rhinoceros has been observed, although adult rhinoceroses are often ignored as potential prey due to a combination of very large size, a short temper, and very thick skin, which render them a laborious and very difficult kill. Young elephant and rhino calves are occasionally taken. Tigers also sometimes prey on such livestock as cattle, horses, and donkeys. These individuals are termed cattle-lifters or cattle-killers in contrast to typical game-killers.
Old tigers, or those wounded and rendered incapable of catching their natural prey, have turned into man-eaters; this pattern has recurred frequently across India. An exceptional case is that of the Sundarbans, where healthy tigers prey upon fishermen and villagers in search of forest produce, humans thereby forming a minor part of the tiger's diet. Tigers will occasionally eat vegetation for dietary fiber, the fruit of the slow match tree being favoured.
Tigers are thought to be nocturnal predators, hunting at night. However, in areas where humans are typically absent, they have been observed via remote-controlled, hidden cameras, hunting during the daylight hours. They generally hunt alone and ambush their prey as most other cats do, overpowering them from any angle, using their body size and strength to knock the prey off balance. Successful hunts usually require the tiger to almost simultaneously leap onto its quarry, knock it over, and grab the throat or nape with its teeth. Even with their great masses, tigers can reach speeds of about 49–65 km/h (30–40 mph), although they can only do so in short bursts, since they have relatively little stamina; consequently, tigers must be relatively close to their prey before they break their cover. If the prey catches wind of the tiger's presence before the moments of the pounce, the tiger will usually abandon the hunt rather than chase prey or battle it head-on. Tigers have great leaping ability; horizontal leaps of up to 10 m (33 ft) have been reported, although leaps of around half this amount are more typical. However, only one in 20 hunts, including any instances of stalking in proximity to potential prey, ends in a successful kill. An adult tiger can go up to two weeks without eating, but then can gorge on up to 34 kg (75 lb) of flesh at one time. In captivity, adult tigers are fed 3 to 6 kg (6.6 to 13.2 lb) of meat a day. Due to their low hunting success rate, ability to go prolonged periods without food, and naturally low population densities, tigers typically have little to no deleterious effect on the populations of the species on which they prey. Several other large carnivores, such as gray wolves, spotted hyenas, and lions, live in groups and need to capture relatively greater quantities of prey to feed and maintain stability in their respective packs, clans, or prides.
When hunting large prey, tigers prefer to bite the throat and use their extremely powerful forelimbs to hold onto the prey, often simultaneously wrestling it to the ground. The tiger remains latched onto the neck until its prey dies of strangulation. By this method, gaurs and water buffalos weighing over a ton have been killed by tigers weighing about a sixth as much. Although they can kill healthy adults of large bovids weighing at least 1,000 kg (2,200 lb), tigers often select the calves or infirm of very large species. Large prey can be quite dangerous to tackle, with the great bulk and massive horns of large bovids, the strong legs and antlers of mature deer, and the long, powerful tusks of boars all being potentially fatal to the tiger. No other extant land predator routinely takes on prey this large on their own. Whilst hunting sambars, which comprise up to 60% of their prey in India, tigers have reportedly called out a passable impersonation of the male sambar's rutting call to attract them. With small prey, such as monkeys and hares, the tiger bites the nape, often breaking the spinal cord, piercing the windpipe, or severing the jugular vein or common carotid artery. Though rarely observed, some tigers have been recorded to kill prey by swiping with their paws, which are powerful enough to smash the skulls of domestic cattle, and break the backs of sloth bears. After killing their prey, tigers sometimes drag it to conceal it in vegetative cover, usually pulling it by grasping with their mouths at the site of the killing bite (on the throat in large prey, on the nape in smaller prey). This, too, can require great physical strength. In one case, after it had killed an adult gaur, a tiger was observed to drag the massive carcass over a distance of 12 m (39 ft). When 13 men simultaneously tried to drag the same carcass later, they were unable to move it.
During the 1980s, a tiger named "Genghis" in Ranthambhore National Park was observed frequently hunting prey through deep lake water, a pattern of behaviour that had not been previously witnessed in over 200 years of observations. Moreover, he appeared to be extraordinarily successful for a tiger, with as many as 20% of hunts ending in a kill.
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Mating can occur all year round, but is generally more common between November and April. A female is only receptive for three to six days and mating is frequent during that time period. A pair will copulate frequently and noisily, like other cats. The gestation period can range from 93 to 112 days, although the average is 104–106 days. The litter size usually consists of one to six cubs, though two or three are usually the norm. Cubs can weigh from 680 to 1,400 g (1.50 to 3.09 lb) each at birth and are born blind and helpless. The females rear them alone, with the birth site and maternal den being sheletered locations such as thickets, caves and rocky crevices. The father of the cubs generally takes no part in rearing them. Unrelated wandering male tigers may even kill cubs to make the female receptive, since the tigress may give birth to another litter within five months if the cubs of the previous litter are lost. The mortality rate of tiger cubs is fairly high – about half do not survive more than two years. Few other predators attack tiger cubs due to the diligence and ferocity of the mother tiger. Beyond humans and other tigers, common causes of cub mortality are starvation, freezing, and accidents.
Generally, a dominant cub emerges in each litter, which tends to be male, but may be of either sex. This cub generally dominates its siblings during play and tends to be more active, leaving its mother earlier than usual. The cubs open their eyes at six to 14 days old. At eight weeks, the cubs may make short ventures out of the den with their mother, although they do not travel with her as she roams her territory until they are older. The cubs are nursed in total for a period of three to six months. Around the time they are weaned, they start regularly engaging in territorial walks with their mother. During this stage, the tigress' young are also taught how to hunt. The cubs are often capable (and nearly adult size) hunters by the time they are 11 months old. The cubs become independent around 18 months of age, but it is not until they are around 2–2½ years old that they fully separate from their mother. Females reach sexual maturity at three to four years, whereas males reach sexual maturity at 4–5 years.
Over the course of her life, a female tiger will typically give birth to an approximately equal number of male and female cubs. Tigers breed well in captivity, and the captive population in the United States may rival the wild population of the world. The known limit for lifespan in captivity is 26 years, and while captive animals usually outlive wild ones, although a wild adult tiger, with no natural predators as long as it does not run afoul of humans, can likely live to a comparable age.
Tigers usually prefer to eat prey they have caught themselves, but are not above eating carrion in times of scarcity and may even pirate prey from other large carnivores. Although predators typically avoid one another, if a prey item is under dispute or a serious competitor is encountered, displays of aggression are a regular occurrence. If these are not sufficient, the conflicts may turn violent and tigers may kill such formidable competitors as leopards, striped hyenas, pythons and even crocodiles on occasion. In some cases, rather than being strictly competitive, the attacks by tigers on other large carnivores seem to be predatory in nature. Situations where smaller predators, such as badgers, lynxes, and foxes are attacked, are almost certainly predatory. Interestingly, this species' closest living relative, the lion, deals with competing predators very differently, undoubtedly because it lives in large prides. Lions do not treat other predators as prey, as do tigers, but invest a good deal of time proactively tracking down other predators and killing them, then leaving their bodies uneaten. Lions kill competitors from honey badgers to spotted hyenas and, in protected areas of Africa, are the leading cause of mortality for African wild dogs and cheetahs. The tiger does not spend as much time tracking down other predators.
The considerably smaller leopard dodges competition from tigers by hunting at different times of the day and hunting different prey. In India’s Nagarhole National Park, most prey selected by leopards were from 30 to 175 kg (66 to 386 lb) against a preference for prey weighing over 176 kg (388 lb) in the tigers. The average prey weight in the two respective big cats in India was 37.6 kg (83 lb) against 91.5 kg (202 lb). With relatively abundant prey, tigers and leopards were seen to successfully coexist without competitive exclusion or interspecies dominance hierarchies that may be more common to the savanna (where the leopard may coexist with the lion). Tigers have been known to suppress wolf populations in areas where the two species coexist, mainly via competitive exclusion. There are four proven records of Siberian tigers killing wolves and not eating them. Dhole packs have been observed to challenge the big cats in disputes over food and have even killed tigers in rare cases. However, tigers have also been observed killing multiple dholes at once, and dholes will typically only attack a tiger directly if the pack is quite large. Lone golden jackals expelled from their pack have been known to form commensal relationships with tigers. These solitary jackals, known as kol-bahl, will attach themselves to a particular tiger, trailing it at a safe distance to feed on the big cat's kills. A kol-bahl will even alert a tiger to a kill with a loud pheal. Tigers have been known to tolerate these jackals: one report describes how a jackal confidently walked in and out between three tigers walking together a few feet away from each other. When in the presence of a tiger, a golden jackal pack will emit a howl very different from its normal vocalization that is thought to function as a warning to other jackals.
Occasionally, a large crocodile may attempt to prey upon a tiger. When seized by a crocodile, a tiger will strike at the reptile's eyes with its paws. Eighteenth-century physician Oliver Goldsmith described the frequent conflicts between mugger crocodiles and tigers that occurred during that time. Thirsty tigers would frequently descend to the rivers to drink and on occasion were seized and killed by the muggers, though more often the tiger escaped and the reptile was disabled. Mature mugger crocodiles may target much the same prey as the tiger, including sambar and water buffalo. Occasionally, a mugger and a tiger will try to claim a carcass killed by either one, resulting in a "tug of war" at the water's edge until one of them comes away with it. A potentially more formidable foe is the larger, more aggressive saltwater crocodile, which the tiger rarely encounters outside of estuarian regions of eastern India.
Other than the rare large crocodile or large dhole pack, the only serious competitors to tigers are bears. Some bears, especially the brown bear of the north, will try to steal tigers' kills, although the tiger will sometimes defend its kill. However, in some cases, bears (especially cubs) are preyed upon by tigers. Although it hunts all its prey by ambush, tigers are especially cautious when handling bears, as many bears are capable of killing a tiger while defending themselves. Predation seems especially prevalent in India, where tigers may attack sloth bears. The sloth bears can be quite aggressive and will sometimes displace young tigers away from their kills or successfully defend themselves with counterattacks. Despite this, sloth bears are killed with some regularity and react fearfully to the presence of tigers or even stimuli related to them (i.e. the call of the sambar deer due to the tiger's impersonation of it). Bears, both Asiatic black bears and brown bears, make up 5–8% of the tiger's diet in the Russian Far East. Some accounts claim that black bears more successfully avoid predation by tigers because they are skilled tree-climbers, although dietary research has contrarily indicated the smaller, less aggressive black bear (comprising 4–6.5% of the tiger's local diet) is the more common prey species than the brown bear (at 1–1.5% of the diet). Siberian tigers and brown bears usually avoid confrontation, but can sometimes be competitors, with dominance seemingly determined by the age, sex, and size of the rivals rather than species. Older and larger males of both species tend to dominate in this interspecies conflict. Some brown bears, upon emerging from hibernation, follow tigers habitually to steal their kills. Tigers will kill brown bear cubs and even adults on some occasions, especially if they find the bears in their dens during the hibernation cycle or in periods of low prey density in the fall. There are also records of brown bears killing tigers up to the size of adult males, either in self-defense or in disputes over kills. Tigers may additionally prey upon the other bear species it encounters (or had encountered historically), which includes giant pandas and sun bears, but information is very limited on such interactions.
The tiger is an endangered species. Poaching for fur and body parts and destruction of habitat have simultaneously greatly reduced tiger populations in the wild. At the start of the 20th century, it is estimated there were over 100,000 tigers in the wild but the population has dwindled outside of captivity to between 1,500 and 3,500. Demand for tiger parts for the purposes of Traditional Chinese Medicine has also been cited as a major threat to tiger populations. Some estimates suggest that there are less than 2,500 mature breeding individuals, with no subpopulation containing more than 250 mature breeding individuals.
India is home to the world's largest population of tigers in the wild. According to the World Wildlife Fund, of the 3,500 tigers around the world, 1,400 are found in India. Only 11% of original Indian tiger habitat remains, and it is becoming significantly fragmented and often degraded.
A major concerted conservation effort, known as Project Tiger, has been underway since 1973, initially spearheaded by Indira Gandhi. The fundamental accomplishment has been the establishment of over 25 well-monitored tiger reserves in reclaimed land where human development is categorically forbidden. The program has been credited with tripling the number of wild Bengal tigers from roughly 1,200 in 1973 to over 3,500 in the 1990s. However, a tiger census carried out in 2007, whose report was published on February 12, 2008, stated that the wild tiger population in India declined by 60% to approximately 1,411. It is noted in the report that the decrease of tiger population can be attributed directly to poaching.
Following the release of the report, the Indian government pledged $153 million to further fund the Project Tiger initiative, set up a Tiger Protection Force to combat poachers, and fund the relocation of up to 200,000 villagers to minimise human-tiger interaction. Additionally, eight new tiger reserves in India were set up. Indian officials successfully started a project to reintroduce the tigers into the Sariska Tiger Reserve. The Ranthambore National Park is often cited as a major success by Indian officials against poaching.
Tigers Forever is a collaboration between the Wildlife Conservation Society and Panthera Corporation to serve as both a science-based action plan and a business model to ensure that tigers live in the wild forever. Initial field sites of Tigers Forever include the world's largest tiger reserve, the 21,756 km2 (8,400 sq mi) Hukaung Valley in Myanmar, the Western Ghats in India, Thailand's Huai Khai Khaeng-Thung Yai protected areas, and other sites in Laos PDR, Cambodia, the Russian Far East and China covering approximately 260,000 km2 (100,000 sq mi) of critical tiger habitat.
The Siberian tiger was on the brink of extinction with only about 40 animals in the wild in the 1940s. Under the Soviet Union, anti-poaching controls were strict and a network of protected zones (zapovedniks) were instituted, leading to a rise in the population to several hundred. Poaching again became a problem in the 1990s, when the economy of Russia collapsed, local hunters had access to a formerly sealed off lucrative Chinese market, and logging in the region increased. While an improvement in the local economy has led to greater resources being invested in conservation efforts, an increase of economic activity has led to an increased rate of development and deforestation. The major obstacle in preserving the species is the enormous territory individual tigers require (up to 450 km2 needed by a single female and more for a single male). Current conservation efforts are led by local governments and NGO's in consort with international organisations, such as the World Wide Fund and the Wildlife Conservation Society. The competitive exclusion of wolves by tigers has been used by Russian conservationists to convince hunters in the Far East to tolerate the big cats, as they limit ungulate populations less than wolves, and are effective in controlling the latter's numbers. Currently, there are about 400–550 animals in the wild.
During the early 1970s, such as in the United Nations Conference on the Human Environment, China rejected the Western-led environmentalist movement as an impeachment on the full use of its own resources. However, this stance softened during the 1980s, as China emerged from diplomatic isolation and desired normal trade relations with Western countries. China became a party to the CITES treaty in 1981, bolstering efforts at tiger conservation by transnational groups like Project Tiger, which were supported by the United Nations Development Programme and the World Bank. In 1988, China passed the Law on the Protection of Wildlife, listing the tiger as a Category I protected species. In 1993, China banned the trade on tiger parts, which led to a drop in the number of tiger bones harvested for use in traditional Chinese medicine.
However, as the tiger bone trade was undermined by effective Chinese legislation in the 1990s, the Tibetan people's trade in tiger pelts emerged as a relatively more important threat to tigers. As wealth in the Tibetan areas increased, singers and participants in annual Tibetan horse races began to wear chuba (coats made out of Tiger skins) with longer trims. Tiger pelt clothing became a standard of beauty, and even mandatory at weddings, with Tibetan families competing to buy larger and larger pelts to demonstrate their social status. In 2003, Chinese customs officials in Tibet intercepted 31 tigers, 581 leopards, and 778 otters, which if sold in the Tibetan capital of Lhasa would have netted $10,000, $850, and $250 respectively. By 2004, international conservation organizations such as World Wide Fund for Nature, Fauna and Flora International, and Conservation International were targeting Tibetans in China in successful environmental propaganda campaigns against the tiger skin trade. In the summer of 2005, the Environmental Investigation Agency sent undercover teams to Litang and Nagchu in order to film documentation of Tibetan violations of Chinese environmental law for submission to the Chinese CITES office. In April 2005, Care for the Wild International and Wildlife Trust of India confronted the 14th Dalai Lama about the Tibetan trade, and his response was recorded as "awkward" and "ambushed", with suspicion against the NGOs for trying to "dramatize" the situation as "mak[ing] it seem as if Tibetans were the culprit".
Although popular accounts since the 1980s have portrayed the Tibetans as "having always lived in harmony with the earth", according to the Professor of Geography Emily Yeh, "None of the 14th Dalai Lama's seven books published before 1985, nor interviews that he gave from his arrival in India in 1959 through the mid-1980s, make reference to environmental issues or the relationship between Tibetan Buddhism and ecology". However, the NGO campaign in India threatened the goodwill of the Indian government towards the Dalai Lama's Central Tibetan Administration; the Indian environmentalist Maneka Gandhi even proposed on television to "throw all Tibetans out of India [as] each one of them is a poacher". In May, the Dalai Lama was confronted in the United States by activists from the National Geographic Society with evidence that Tibetans were the primary cause of the illegal tiger trade in China; he reacted as describing himself as "embarrassed". At the 2006 Kalachakra festival in India, he gave a speech to an audience of 10,000, including 8000 Tibetans from China, in which he condemned "following the bad example of the ostentatious garments made of tiger and leopard pelts worn by some protector deities such as Dgra lha" as "shameful". The speech made no reference to ethical or religious issues about killing animals, but instead focused on the reputation of Tibetan exiles and their threatened status as citizens of India. The Dalai Lama later took credit in a press release for incidents of Tibetans burning their chubas, while decrying the arrest of those who complied with environmental regulations as a political statement in support of him.
The global wild tiger population is estimated at anywhere between 3,062 and 3,948 individuals. The World Wide Fund for Nature estimates the tiger population at 3,200. The exact number of wild tigers is unknown, as many estimates are outdated or come from educated guesses. Few estimates are considered reliable, coming from comprehensive scientific censuses. The table shows estimates per country according to IUCN and range country governments.
Although the term "rewilding" was used in conservation in other contexts since at least 1990, it was first applied to the restoration of a single species of carnivores by conservationist and ex-carnivore manager of Pilanesberg National Park, Gus Van Dyk in 2003.
In 1978, the Indian conservationist Billy Arjan Singh attempted to rewild a tiger in Dudhwa National Park; this was the tigress Tara who had been born and reared in a zoo. Soon after the release, a large number of people were killed and eaten by a tigress who was subsequently shot. Government officials claim that this tigress was Tara, an assertion hotly contested by Singh and some other conservationists. Later on, this rewilding gained further disrepute when it was discovered that the local gene pool had been sullied by Tara's introduction because she was partly Siberian tiger, a fact not known at the time of her release, ostensibly due to poor record-keeping at Twycross Zoo where she had been raised.
The organisation Save China's Tigers, working with the Wildlife Research Centre of the State Forestry Administration of China and the Chinese Tigers South Africa Trust, secured an agreement on the reintroduction of Chinese tigers into the wild. The agreement, which was signed in Beijing on 26 November 2002, calls for the establishment of a Chinese tiger conservation model through the creation of a pilot reserve in China where indigenous wildlife, including the South China Tiger, will be reintroduced. Save China's Tigers aims to rewild the critically endangered South China Tiger by bringing a few captive-bred individuals to South Africa for rehabilitation training for them to regain their hunting instincts. At the same time, a pilot reserve in China is being set up and the tigers will be relocated and release back in China when the reserve in China is ready. The offspring of the trained tigers will be released into the pilot reserves in China, while the original animals will stay in South Africa to continue breeding.
South Africa was chosen as a springboard thanks to its leadership in wildlife management, readily available land, and abundant game. SCT has also been working with the Chinese government to identify suitable sites for the establishment of pilot reserves in China. The South China tigers of the project have since been successfully rewilded and are fully capable of hunting and surviving on their own. This project is also very successful in the breeding of these rewilded South China tigers and five cubs have been born in the project, these cubs of the second generation would be able to learn their survival skills directly from their successfully rewilded mothers.
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Save China's Tigers' South China tiger rewilding and reintroduction project has been deemed a success. Recently, renowned scientists have confirmed the role of Rewilding captive populations to save the South China tiger. A rewilding workshop conducted in the October 2010, in Laohu Valley reserve, South Africa to access the progress of the rewilding and reintroduction program of Save China's Tigers. The experts present includes Dr. Peter Crawshaw of Centro Nacional de Pesquisa e Conservacão de Mamiferos Carnivoros, Cenap/ICMBIO, Dr. Gary Koehler, Dr. Laurie Marker of Cheetah Conservation Fund, Dr. Jim Sanderson of Small Wild Cat Conservation Foundation, Dr. Nobuyuki Yamaguchi of Department of Biological and Environmental Sciences of Qatar University, and Dr. David Smith of University of Minnesota, Chinese government scientists as well as representatives of Save China's Tigers.
The tigers involved were born in captive conditions in concrete cages and their parents are all captive animals who are unable to survive in the wild. They were sent to South Africa as part of the Save China's Tigers project to rewilding and ensure that they regain the necessary skills needed for a predator to survive in the wild.
Results of the workshop confirmed the important role of the South China Tiger Rewilding Project in tiger conservation. "Having seen the tigers hunting in an open environment at Laohu Valley Reserve, I believe that these rewilded tigers have the skill to hunt in any environment." Dr. David Smith remarked. Furthermore, Save China's Tigers recovered natural habitat both in China and in South Africa during their attempt to reintroduce South China tigers back into the wild.
The goal is of preparing tigers born in captivity for introduction to wild habitat in China where tigers once lived seems to be very possible in the near future based on the success of the rewilding and reintroduction program.
The tiger has been one of the Big Five game animals of Asia. Tiger hunting took place on a large scale in the early nineteenth and twentieth centuries, being a recognised and admired sport by the British in colonial India as well as the maharajas and aristocratic class of the erstwhile princely states of pre-independence India. A single maharaja or English hunter could claim to kill over a hundred tigers in their hunting career. Tiger hunting was done by some hunters on foot; others sat up on machans with a goat or buffalo tied out as bait; yet others on elephant-back. In some cases, villagers beating drums were organised to drive the animals into the killing zone. Elaborate instructions were available for the skinning of tigers and there were taxidermists who specialised in the preparation of tiger skins.
Normally wild tigers, especially if they have no prior contact with humans, will actively avoid interactions with humans. However, according to some sources, tigers are thought to be responsible for more human deaths through direct attack than any other wild mammal. Attacks are occasionally provoked, as tigers will lash out after being injured while they themselves are hunted. Occasionally, attacks are provoked accidentally, as when a human surprises a tiger or inadvertently comes between a mother and her young. Occasionally human behavior will inadvertently provoke tiger attacks by triggering their natural instincts. In one case, a postman who delivered mail on foot in a rural region of India where interactions with tigers are commonplace, was not bothered by them for several years despite many interactions. Soon after the postman started to use a bicycle, the man was attacked by a tiger, theoretically having been instinctively provoked by the chase. Although humans are not regular prey for tigers, occasionally tigers will come to view people as prey. Such attacks tend to be particularly prevalent in areas where population growth, logging, and farming have put pressure on tiger habitats and reduced wild prey for them. Most man-eating tigers are old and missing teeth, acquiring a taste for humans because of their inability to capture their preferred prey. This was the case in the Champawat Tiger, a tigress found in Nepal and then India, that was found to have had two broken canines. She was responsible for an estimated 430 human deaths, the most attacks known to be perpetrated by a single wild animal per the Guinness Book of Records, by the time she was shot in 1907 by Jim Corbett.
Unlike man-eating leopards, even established man-eating tigers will seldom enter human settlements, usually remaining at village outskirts. Nevertheless, attacks in human villages do occur. Tigers treat humans as they do other potential prey, engaging in a length stalking phase before pouncing from close range. Despite being mostly a nocturnal predator, tigers attack humans in daytime. According to Jim Corbett, arguably the greatest expert on man-eating tigers, he had never heard of a tiger attacking a human at night (unlike man-eating leopards, who attack humans only at night, and are afraid of humans in daytime). Attacks are also common when people are working outdoors and are physically engaged in distracting tasks, particularly when the work requires them to bend down (collecting firewood, working on field cultivation, or answering the call of nature). Thanks to their natural predatory instincts, such as their use of stealth and surprise and their tendency to attack partially isolated people, early writings tend to profile man-eating tigers and other similarly disposed big cats as "cowardly". Due to the size and power of the tiger, few humans survive when a predatory attack is carried out.
Reportedly, in the Singapore area (where tigers are now extirpated) in the 1840s, an estimated 1,000 fatalities occurred from tiger attacks. Man-eaters have been a particular problem in recent decades in India and Bangladesh, especially in Kumaon, Garhwal and the Sundarbans mangrove swamps of Bengal, where some healthy tigers have been known to hunt humans. Because of rapid habitat loss attributed to climate change, tiger attacks have increased in the Sundarbans. The Sundarbans area reportedly had 129 human deaths from tigers from 1969 to 1971. In the 10 years prior to that period, according to Chakrabarti (1984), humans were preyed upon at an estimated rate of 100 per year in the Sudarban region, with a possible high of around 430 in some years of the 1960s. Unusually, in some years in the Sundarbans, more humans are killed by tigers than vice versa. In the year of 1972, India's production of honey and beeswax dropped by 50% when at least 29 people who gathered these materials were devoured.
Almost all tigers that are identified as man-eaters are quickly captured, shot, or poisoned. Current Indian wildlife protection laws state that animals must be saved unless the tiger is a repeat offender and no hope exists for rehabilitation. However, man-eating attacks may still lead to revenge killing of several tigers, including those not involved in the attack. On occasion, man-eating tigers are relocated to large nature preserves, with mixed success. In 1986 in the Sundarbans, since tiger almost always attack from the rear, the idea was implemented that masks with human faces on them be worn to the back of the head, on the theory that tigers will usually not carry through attacks if seen by their prey. This temporarily decreased the number of attack, though the tigers appeared to become habituated to the masks and attacks again increased in the following years.
Tigers kept in captivity retain wild instinct and, especially those in privately owned collections where improper handling is more common, may attack humans. An estimated 1.75 fatal attacks occur per year in captivity, with at least 27 people killed or seriously injured in the United States by tigers from 1998 to 2001. In large, well-kept public zoos, tiger attacks on humans are very rare and tigers who associate with their zookeepers from birth may be docile and even affectionate towards their handlers once fully grown. However, most zoos are rightfully cautious and, when the tigers must be handled closely (such as medical procedures), it is a necessity to assure that tigers are fully unconscious from anesthesia. Tatiana, a female tiger, escaped from her enclosure in the San Francisco Zoo, killing one person and seriously injuring two more before being shot and killed by the police. The enclosure had walls that were lower than they were legally required to be, allowing the tiger to climb the wall and escape.
Historically, tigers have been hunted at a large scale so their famous striped skins could be collected. The trade in tiger skins peaked in 1960s, just before international conservation efforts took effect. By 1977, a tiger skin in an English market was considered to be worth $4,250 US dollars.
Many people in China and other parts of Asia have a belief that various tiger parts have medicinal properties, including as pain killers and aphrodisiacs. There is no scientific evidence to support these beliefs. The use of tiger parts in pharmaceutical drugs in China is already banned, and the government has made some offenses in connection with tiger poaching punishable by death. Furthermore, all trade in tiger parts is illegal under the Convention on International Trade in Endangered Species of Wild Fauna and Flora and a domestic trade ban has been in place in China since 1993.
However, the trading of tiger parts in Asia has become a major black market industry and governmental and conservation attempts to stop it have been ineffective to date. Almost all black marketers engaged in the trade are based in China and have either been shipped and sold within in their own country or into Taiwan, South Korea or Japan. The Chinese subspecies was almost completely decimated by killing for commerce due to both the parts and skin trades in the 1950s through the 1970s. Contributing to the illegal trade, there are a number of tiger farms in the country specialising in breeding the cats for profit. It is estimated that between 5,000 and 10,000 captive-bred, semi-tame animals live in these farms today. However, many tigers for traditional medicine black market are wild ones shot or snared by poachers and may be caught anywhere in the tiger's remaining range (from Siberia to India to the Malay Peninsula to Sumatra). In the Asian black market, a tiger penis can be worth the equivalent of around $300 U.S. dollars. In the years of 1990 through 1992, 27 million products with tiger deriatives were found.
In recent years, captive breeding of tigers in China has accelerated to the point where the captive population of several tiger subspecies exceeds 4,000 animals, with a greater number of legally kept tigers in that country alone than all populations of tigers in the wild combined. Three thousand specimens are reportedly held by 10–20 "significant" facilities, with the remainder scattered among some 200 facilities. This makes China home to the second largest captive tiger population in the world, after the USA, which in 2005 had an estimated 4,692 captive tigers. In a census conducted by the US based Feline Conservation Federation in 2011, 2,884 tigers were documented as residing in 468 American facilities.
Part of the reason for America's large tiger population relates to legislation. Only nineteen states have banned private ownership of tigers, fifteen require only a license, and sixteen states have no regulations at all. The success of breeding programmes at American zoos and circuses led to an overabundance of cubs in the 1980s and 1990s, which drove down prices for the animals. The Society for the Prevention of Cruelty to Animals of Texas estimate there are now 500 lions, tigers and other big cats in private ownership just in the Houston, Texas.[verification needed] A private zoo in Zanesville, Ohio owned 18 Bengal tigers, all of which were shot dead by Ohio authorities after their owner released them, along with many other dangerous animals, before committing suicide on October 18, 2011.
Genetic ancestry of 105 captive tigers from 14 countries and regions was assessed by using Bayesian analysis and diagnostic genetic markers defined by a prior analysis of 134 voucher tigers of significant genetic distinctiveness. Of the 105 captive tigers, 49 specimen were assigned to one of five subspecies; 52 specimen had admixed subspecies origins.
The Tiger Species Survival Plan devised by the Association of Zoos and Aquariums has condemned the breeding of white tigers on the allegation that they are of mixed ancestry, hybridized with other subspecies and are of unknown lineage. The genes responsible for white colour are represented by 0.001% of the population. The disproportionate growth in numbers of white tigers points to the relentless inbreeding resorted to among homozygous recessive individuals for selectively multiplying the white animals. This progressively increasing process will eventually lead to inbreeding depression and loss of genetic variability.
The Bengal tiger is the national animal of India and Bangladesh. The Malaysian tiger is the national animal of Malaysia. The Siberian tiger is the national animal of South Korea.
The tiger replaces the lion as King of the Beasts in cultures of eastern Asia representing royalty, fearlessness and wrath. Its forehead has a marking which resembles the Chinese character 王, which means "king"; consequently, many cartoon depictions of tigers in China and Korea are drawn with 王 on their forehead.
Of great importance in Chinese myth and culture, the tiger is one of the 12 Chinese zodiac animals. Also in various Chinese art and martial art, the tiger is depicted as an earth symbol and equal rival of the Chinese dragon – the two representing matter and spirit respectively. The Southern Chinese martial art Hung Ga is based on the movements of the tiger and the crane. In Imperial China, a tiger was the personification of war and often represented the highest army general (or present day defense secretary), while the emperor and empress were represented by a dragon and phoenix, respectively. The White Tiger (Chinese: 白虎; pinyin: Bái Hǔ) is one of the Four Symbols of the Chinese constellations. It is sometimes called the White Tiger of the West (西方白虎), and it represents the west and the autumn season.
In Buddhism, it is also one of the Three Senseless Creatures, symbolising anger, with the monkey representing greed and the deer lovesickness.
The Tungusic people considered the Siberian tiger a near-deity and often referred to it as "Grandfather" or "Old man". The Udege and Nanai called it "Amba". The Manchu considered the Siberian tiger as Hu Lin, the king.
The widely worshiped Hindu goddess Durga, an aspect of Devi-Parvati, is a ten-armed warrior who rides the tigress (or lioness) Damon into battle. In southern India the god Ayyappan was associated with a tiger.
The tiger continues to be a subject in literature; both Rudyard Kipling, in The Jungle Book, and William Blake, in Songs of Experience, depict the tiger as a menacing and fearful animal. In The Jungle Book, the tiger, Shere Khan, is the wicked mortal enemy of the protagonist, Mowgli. However, other depictions are more benign: Tigger, the tiger from A. A. Milne's Winnie-the-Pooh stories, is cuddly and likable. In the Man Booker Prize winning novel "Life of Pi", the protagonist, Pi Patel, sole human survivor of a ship wreck in the Pacific Ocean, befriends another survivor: a large Bengal tiger. The famous comic strip Calvin and Hobbes features Calvin and his stuffed tiger, Hobbes.
In a poll conducted by Animal Planet, the tiger was voted the world's favourite animal, narrowly beating the dog. More than 50,000 viewers from 73 countries voted in the poll. Tigers received 21% of the vote, dogs 20%, dolphins 13%, horses 10%, lions 9%, snakes 8%, followed by elephants, chimpanzees, orangutans and whales.
Animal behaviourist Candy d'Sa, who worked with Animal Planet on the list, said: "We can relate to the tiger, as it is fierce and commanding on the outside, but noble and discerning on the inside".
Callum Rankine, international species officer at the World Wildlife Federation conservation charity, said the result gave him hope. "If people are voting tigers as their favourite animal, it means they recognise their importance, and hopefully the need to ensure their survival," he said.
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