Etymology
TheTaxonomy
In 1758,Subspecies
NineEvolution
The tiger shares the genus ''Panthera'' with theHybrids
Tigers canCoat
The tiger's coat usually has short hairs, reaching up to , though the hairs of the northern-living Siberian tiger can reach . Belly hairs tend to be longer than back hairs. The density of their fur is usually thin, though the Siberian tiger develops a particularly thick winter coat. The tiger has lines of fur around the face and long whiskers, especially in males. It has an orange colouration that varies from yellowish to reddish. White fur covers the underside, from head to tail, along with the inner surface of the legs and parts of the face. On the back of the ears, it has a prominent white spot, which is surrounded by black. The tiger is marked with distinctive black or dark brown stripes, which are uniquely patterned in each individual. The stripes are mostly vertical, but those on the limbs and forehead are horizontal. They are more concentrated towards the backside and those on the trunk may reach under the belly. The tips of stripes are generally sharp and some may split up or split and fuse again. Tail stripes are thick bands and a black tip marks the end. The tiger is one of only a few striped cat species. Stripes are advantageous forColour variations
Distribution and habitat
Population density
Camera trapping during 2010–2015 in the deciduous and subtropical pine forest of Jim Corbett National Park, northern India revealed a stable tiger population density of 12–17 individuals per in an area of . In northern Myanmar, the population density in a sampled area of roughly in a mosaic of tropical broadleaf forest and grassland was estimated to be 0.21–0.44 tigers per as of 2009. Population density in mixed deciduous and semi-evergreen forests of Thailand's Huai Kha Khaeng Wildlife Sanctuary was estimated at 2.01 tigers per ; during the 1970s and 1980s, logging and poaching had occurred in the adjacent Mae Wong National Park, Mae Wong and Khlong Lan National Parks, where population density was much lower, estimated at only 0.359 tigers per as of 2016. Population density in Dipterocarpaceae, dipterocarp and montane forests in northern Malaysia was estimated at 1.47–2.43 adult tigers per in Royal Belum State Park, but 0.3–0.92 adult tigers per in the unprotected selective logging, selectively logged Temengor Forest Reserve.Behaviour and ecology
Social spacing
Adult tigers lead largely solitary lives withinCommunication
During friendly encounters and bonding, tigers bunting (animal behavior), rub against each other's bodies. Facial expressions include the "defence threat", which involves a wrinkled face, bared teeth, pulled-back ears and widened pupils. Both males and females show a flehmen response, a characteristic curled-lip grimace, when smelling urine markings. Males also use the flehmen to detect the markings made by tigresses in oestrus. Tigers will move their ears around to display the white spots, particularly during aggressive encounters and between mothers and cubs. They also use their tails to signal their mood. To show cordiality, the tail sticks up and sways slowly, while an apprehensive tiger lowers its tail or wags it side-to-side. When calm, the tail hangs low. Tigers are normally silent but can produce numerous vocalisations. They roar to signal their presence to other individuals over long distances. This vocalisation is forced through an open mouth as it closes and can be heard away. They roar multiple times in a row and others respond in kind. Tigers also roar during mating and a mother will roar to call her cubs to her. When tense, tigers moan, a sound similar to a roar but softer and made when the mouth is at least partially closed. Moaning can be heard away. Aggressive encounters involve growling, snarling and hissing. An explosive "coughing roar" or "coughing snarl" is emitted through an open mouth and exposed teeth. In friendlier situations, tigers prusten, a soft, low-frequency snorting sound similar to purring in smaller cats. Tiger mothers communicate with their cubs by grunting, while cubs call back with miaows. When startled, they "woof". They produce a deer-like "pok" sound for unknown reasons, but most often at kills.Hunting and diet
Competitors
Reproduction and life cycle
The tiger generally Mating, mates all year round, particularly between November and April. A tigress is in oestrus for three to six days at a time, separated by three to nine week intervals. A resident male mates with all the females within his home range, who signal their receptiveness by roaring and marking. Younger, transient males are also attracted, leading to a fight in which the more dominant, resident male drives the usurper off. During courtship, the male is cautious with the female as he waits for her to show signs she is ready to mate. She signals to him by positioning herself in Lordosis behavior, lordosis with her tail to the side. Copulation (zoology), Copulation typically lasts no more than 20 seconds, with the male biting the female by the scruff of her neck. After it is finished, the male quickly pulls away as the female may turn and slap him. Tiger pairs may stay together for up to four days and mate multiple times. Gestation lasts around or over three months. A tigress gives birth in a secluded location, be it in dense vegetation, in a cave or under a rocky shelter. Litter (zoology), Litters consist of as many as seven cubs, but two or three are more typical. Newborn cubs weigh and are blind and Precociality and altriciality, altricial. The mother licks and cleans her cubs, suckles them and viciously defends them from any potential threat. Cubs open their eyes at the age of three to 14 days and their vision becomes clear after a few more weeks. They can leave the denning site after two months and around the same time they start eating meat. The mother only leaves them alone to hunt and even then she does not travel far. When she suspects an area is no longer safe, she moves her cubs to a new spot, transporting them one by one by grabbing them by the scruff of the neck with her mouth. A tigress in Sikhote-Alin Biosphere Reserve maximised the time spent with her cubs by reducing her home range, killing larger prey and returning to her den more rapidly than without cubs; when the cubs started to eat meat, she took them to kill sites, thereby optimising their protection and access to food. In the same reserve, one of 21 cubs died in over eight years of monitoring and mortality did not differ between male and female juveniles. Tiger monitoring over six years in Ranthambore Tiger Reserve indicated an average annual survival rate of around 85 percent for 74 male and female cubs; survival rate increased to 97 percent for both males and female juveniles of one to two years of age. Causes of cub mortality include predators, floods, fires, death of the mother and fatal injuries.Health and diseases
Tigers are recorded as hosts for various parasites including tapeworms like ''Diphyllobothrium erinacei'', ''Taenia pisiformis'' in India and nematodes like ''Toxocara'' species in India and ''Physaloptera preputialis'', ''Dirofilaria ursi'' and ''Uiteinarta'' species in Siberia. Canine distemper is known to occur in Siberian tigers. A morbillivirus infection was the likely cause of death of a tigress in the Russian Far East that was also tested positive for feline panleukopenia and feline coronavirus. Blood samples from 11 adult tigers in Nepal showed antibody, antibodies for canine parvovirus-2, feline herpesvirus, feline coronavirus, leptospirosis and ''Toxoplasma gondii''.Threats
The tiger has been listed as Endangered on the IUCN Red List since 1986 and the global tiger population is thought to have continuously declined from an estimated population of 5,000–8,262 tigers in the late 1990s to 3,726–5,578 individuals estimated as of 2022. During 2001–2020, landscapes where tigers live declined from to . Habitat destruction, habitat fragmentation andConservation
Internationally, the tiger is protected under CITES#Appendix I, CITES Appendix I, banning trade of live tigers and their body parts. In Russia, hunting the tiger has been banned since 1952. In Bhutan, it has been protected since 1969 and enlisted as totally protected since 1995. Since 1972, it has been afforded the highest protection level under India's Wild Life (Protection) Act, 1972. In Nepal and Bangladesh, it has been protected since 1973. Since 1976, it has been totally protected under Malaysia's Protection of Wild Life Act, and the country's Wildlife Conservation Act enacted in 2010 increased punishments for wildlife-related crimes. In Indonesia, it has been protected since 1990. In China, the trade in tiger body parts was banned in 1993. The Thai Wildlife Preservation and Protection Act was enacted in 2019 to combat poaching and trading of body parts. In 1973, the National Tiger Conservation Authority and Project Tiger were founded in India to gain public support for tiger conservation. Since then, 53 Tiger reserves of India, tiger reserves covering an area of have been established in the country up to 2022. These efforts contributed to the recovery of India's tiger population between 2006 and 2018 so that it occurs in an area of about . Myanmar's national tiger conservation strategy developed in 2003 comprises management tasks such as restoration of degraded habitats, increasing the extent of protected areas and wildlife corridors, protecting tiger prey species, thwarting tiger killing and illegal trade of its body parts and promoting public awareness through wildlife education programmes. Bhutan's first Tiger Action Plan implemented during 2006–2015 revolved around habitat conservation, human–wildlife conflict management, education and awareness; the second Action Plan aimed at increasing the country's tiger population by 20% until 2023 compared to 2015. In 2009, the Bangladesh Tiger Action Plan was initiated to stabilise the country's tiger population, maintain habitat and a sufficient prey base, improve law enforcement and foster cooperation between governmental agencies responsible for tiger conservation. The Thailand Tiger Action Plan ratified in 2010 envisioned increasing the country's tiger populations by 50% in the Western Forest Complex and Dong Phayayen–Khao Yai Forest Complex and reestablish populations in three potential landscapes until 2022. The Indonesian National Tiger Recovery Program ratified in 2010 aimed at increasing the Sumatran tiger population by 2022. The third strategic and action plan for the conservation of the Sumatran tiger for the years 2020–2030 revolves around strengthening management of small tiger population units of less than 20 mature individuals and connectivity between 13 forest patches in North Sumatra and West Sumatra provinces.Relationship with humans
Hunting
Tigers have been hunted by humans for millennia, as indicated by a painting on the Bhimbetka rock shelters in India that is dated to 5,000–6,000 years ago. They were hunted throughout their range in Asia, chased on horseback, elephant-back or even with sled dogs and killed with spears and later firearms. Such hunts were conducted both by Asian governments and empires like the Mughal Empire, as well as European colonists. Tigers were often hunted as trophy hunting, trophies and because of their perceived danger. An estimated 80,000 tigers were killed between 1875 and 1925.Attacks
Captivity
Tigers have been kept in captivity since ancient times. In ancient Rome, tigers were displayed in amphitheatres; they were slaughtered in venatio hunts and used to Damnatio ad bestias, kill criminals. The Mongol ruler Kublai Khan is reported to have kept tigers in the 13th century. Starting in the Middle Ages, tigers were being kept in European menageries. Tigers and other exotic animals were mainly used for the entertainment of elites but from the 19th century onward, they were exhibited more to the public. Tigers were particularly big attractions and their captive population soared. In 2020, there were over 8,000 captive tigers in Asia, over 5,000 in the US and no less than 850 in Europe. There are more tigers in captivity than in the wild. Captive tigers may display Stereotypy (non-human), stereotypical behaviours such as pacing or inactivity. Modern zoos are able to reduce such behaviours with exhibits designed so the animals can move between separate but connected enclosures. Enrichment items are also important for the cat's welfare and the stimulation of its natural behaviours. Tigers have played prominent roles inCultural significance
The tiger is among the most famous of theSee also
* List of largest cats * International Tiger Day * Tiger TempleReferences
Bibliography
* * * * * * * *External links
* * * * * {{Portal bar, Cats, Mammals, Animals, Biology, Asia Tigers, Apex predators Big cats Conservation-reliant species EDGE species Extant Pleistocene first appearances Fauna of South Asia Fauna of Southeast Asia Felids of Asia Mammals described in 1758 Mammals of East Asia National symbols of India National symbols of Malaysia National symbols of Singapore Panthera Species that are or were threatened by agricultural development Species that are or were threatened by deliberate extirpation efforts Species that are or were threatened by logging Species that are or were threatened by urbanization Taxa named by Carl Linnaeus