Tiger

The tiger (Panthera tigris) is the largest living cat species on Earth and one of the most iconic members of the genus Panthera, which also includes the lion, leopard, jaguar, and snow leopard. Instantly recognizable by its bold pattern of dark vertical stripes overlaid on orange-brown fur with a pale underside, the tiger is unique among the large felids in that no two individuals bear the same stripe pattern — each is as individually distinctive as a human fingerprint. Six subspecies are currently recognized: the Bengal tiger (P. t. tigris), the most numerous with approximately 2,600 individuals concentrated in India; the Amur or Siberian tiger (P. t. altaica), the largest-bodied subspecies adapted to extreme cold; the Indochinese tiger (P. t. corbetti); the Malayan tiger (P. t. jacksoni); the South China tiger (P. t. amoyensis), which is critically endangered and may be extinct in the wild; and the Sumatran tiger (P. t. sumatrae), a compact island subspecies. The global wild tiger population is estimated at approximately 3,900 individuals, representing a catastrophic decline from an estimated 100,000 at the start of the 20th century. Tigers are apex predators whose presence regulates prey populations and maintains the ecological integrity of large forest ecosystems across Asia.

The tiger is a powerfully built felid with a muscular body, robust forelimbs, and a large, broad skull housing massive jaw muscles capable of generating tremendous bite force. Adult males of the Amur subspecies — the largest living cats — can reach body lengths of 3.3 meters from nose to tail tip and weigh up to 300 kilograms, though Bengal males average 220 kilograms. Females are consistently smaller, typically 30 to 40 percent lighter than males of the same subspecies. The fur coloration varies by subspecies: Sumatran tigers are the darkest, with closely spaced stripes, while Amur tigers tend toward paler, more widely spaced markings that provide camouflage against snow. The stripes penetrate into the skin — shaving a tiger would reveal the same pattern on the underlying skin. The eyes are amber to yellow-green, with round pupils, and the tapetum lucidum reflective layer behind the retina gives tigers night vision approximately six times more acute than a human's, a critical adaptation for crepuscular and nocturnal hunting.

Tigers are fundamentally solitary animals, and adult males and females interact almost exclusively for mating. Each individual maintains a clearly delineated territory, enforced through a sophisticated scent-marking system involving urine sprays mixed with anal gland secretions, feces, and claw raking on trees. Male territories are substantially larger than female territories and typically encompass the ranges of several resident females. Territorial boundaries are generally respected by neighboring individuals, minimizing costly direct confrontations, though boundary disputes can result in serious fights. Tigers are primarily nocturnal hunters but will hunt by day in areas of low human disturbance. Their hunting strategy is built on stealth and ambush rather than sustained pursuit: a tiger will stalk prey through dense cover, moving with extraordinary quietness despite its size, then launch an explosive short-range charge covering up to 10 meters per second. The killing bite is typically delivered to the throat or nape of the neck. Tigers are notably strong swimmers and regularly cross rivers and lakes up to several kilometers wide, an important dispersal mechanism that facilitates gene flow between isolated forest patches. Outside of the breeding season, vocalizations include chuffing — a non-threatening puffing sound used in friendly encounters — as well as growls, snarls, and the deep, resonant roar that can carry up to 3 kilometers through forest.

Tigers are obligate carnivores and highly specialized pursuit-and-ambush hunters of large ungulates. Across their range, the primary prey species include sambar deer, chital (spotted deer), muntjac, wild boar, gaur, water buffalo, barasingha, nilgai, and banteng, with preferred species varying by geographic region and local prey availability. Bengal tigers in India depend heavily on chital and sambar, while Amur tigers in Russia prey predominantly on Siberian roe deer, sika deer, and wild boar, supplementing with elk and wild pig during winter when smaller prey is scarce. A single large kill can provide a tiger with 40 to 50 kilograms of meat, satisfying caloric needs for several days. Tigers can consume up to 40 kilograms of meat in a single feeding session and typically return to large kills for multiple meals, caching the carcass when possible. An adult tiger requires an estimated 3,000 to 3,900 kilograms of prey per year to sustain itself. Occasionally, tigers prey on elephant calves, young rhinoceroses, crocodilians, and fish obtained by scooping from shallow water. Livestock depredation is common in areas where wild prey has been depleted, creating significant human-tiger conflict. Documented instances of individual tigers developing specializations in hunting particularly dangerous prey — such as large bull gaur or mugger crocodiles — indicate substantial individual variation in hunting behavior.

Tigers are polygynous, with males mating with multiple females whose territories overlap their own. Females reach sexual maturity at 3 to 4 years of age and have an estrous cycle of approximately 3 to 9 weeks, with individual estrus periods lasting 3 to 6 days. Mating can occur year-round but peaks during the cool winter months across much of the range. Courtship involves vocalizations, mutual scent marking, and extended periods of close association before copulation occurs repeatedly over several days. Gestation lasts between 93 and 114 days, after which the female gives birth in a secluded den — a dense thicket, cave, or tall grass — to a litter of typically 2 to 4 cubs, though litters of up to 7 have been recorded. Cubs are born blind and helpless, weighing 780 to 1,600 grams. The eyes open at 6 to 14 days, and cubs begin venturing outside the den at 2 months. The mother provides all parental care; males play no role in raising offspring. Cubs begin participating in hunts at 5 to 6 months and are capable of making their own kills by 11 months, though they continue to depend on their mother for nutrition and protection. Dispersal occurs between 2 and 3 years of age, with males typically dispersing farther than females. Cub mortality is high — estimated at 30 to 50 percent in the first year — due to starvation, infanticide by rival males, and predation. Females breed again roughly 18 to 24 months after a successful litter.

Tigers are both respected and feared. Human-tiger conflict is a significant issue in areas where human settlements expand into tiger territories.