TIGER
Panthera tigris


ANATOMY
COLOR: Tigers have striped fur, usually black stripes on orange with a white underbelly. White tigers (mutated Bengal tigers from India; they are not albinos) are white with dark brown or deep marroon stripes, pink noses, and blue eyes. Black tigers (extremely rare) have black fur with orange to yellow stripes. Even rarer, stripeless tigers have been recorded.

SIZE: Adult tigers range from 4.5 feet to 9 feet long. Males are larger than females. The largest tigers are the Siberian tigers, weighing about 500 pounds; the smallest are the Sumatran tigers, weighing about 250 pounds. Tigers tails are 3-4 feet long.

EYES: Like most cats, their night-time vision is very good. They have round pupils and yellow irises (except white tigers which have blue eyes).

TEETH AND CLAWS: Tigers have retractible claws. Tigers have the largest canine teeth of any land-based carnivores.

CLASSIFICATION
Tigers belong to the Kingdom Animalia (the animals), Phylum Chordata, Subphylum Vertebrata (animals with backbones), Class Mammalia (warm-blooded animals with fur and mammary glands), Order Carnivora (Meat-eaters), Family Felidae (the cats), Genus Panthera, species tigris (the tigers). There are five tiger subspecies including the Bengal tiger (Panthera tigris tigris), Siberian tiger (Panthera tigris altaica), Sumatran tiger (Panthera tigris sumatrae), South China tiger (Panthera tigris amoyensis), and Indochinese toger (Panthera tigris corbetti). There are 3 extinct subspecies, the Bali tiger (Panthera tigris balica), the Javan tiger (Panthera tigris sondaicus), and the Caspian tiger (Panthera tigris virgata).

BEHAVIOR AND SOCIAL HABITS
Tigers are mostly solitary animals except for times of mating and when the female cares for her young cubs. Sometimes tigers gather to share a large kill. Tigers are most active at night (they are primarily nocturnal), but are active in the day during the winter. Tigers mark out their territory, like most cats, by spraying their urine together with a glandular secretion, by leaving fecal droppings, or by scratching marks into trees with their claws. Tigers need a territory of about 10-30 or more square miles to provide enough prey to support them. The size of the territory depends on the amount of prey available in the area.

REPRODUCTION
Tigers breed during the winter season and females give birth to 2-4 blind cubs about 103 days later. The cubs weigh about 2-3 pounds at birth. One cub frequently dies at birth. The cubs live on mother's milk for 6-8 weeks and then are introduced to meat. Cubs are dependant on the mother for about a year and a half; they can start hunting on their own at this age. Female tigers reach sexual maturity at about 3 years old; males reach maturity in about 4 years.

HABITATS
Tigers live in Asia, primarily in forests. Tigers are very good swimmers and like the water, unlike most cats.

Tigers evolved in south central China and moved to nearby areas, like Siberia, Sumatra, Indochina, and India. There are no tigers native to Africa.

The Siberian tiger lives in Siberia and Manchuria, in mountain forests in to elevations up to 3,000 feet.

DIET
Tigers are meat eaters (carnivores). Their prey includes small- to medium-sized mammals (like badgers, rabbits, boars, deer, and wild cattle), ranging in size from 60 to 2,000 pounds. The usual method of killing is to ambush the animal from behind and bite its neck; this usually breaks the prey's spinal cord, killing it. Tigers then drag the kill to a safe place in which they eat it. Tigers can eat as much as 40 pounds of meat in one sitting. They can go for days at a time without eating.

LOCOMOTION
Tigers are very fast quadrupeds (four-legged animals).

LIFE SPAN
Tigers live about 10-15 years in the wild, and about 20 years in captivity.

EXTINCTION STATUS
Tigers are threatened with extinction due to loss of habitat. There are 5 surviving subspecies, 3 other subspecies have gone extinct in the last 70 years. There are estimated to be about 5,000 to 7,400 tigers left in the wild.

EXTINCT VARIETIES
There are three tiger subspecies that have become extinct in the last 70 years. They include: the Bali tiger (Panthera tigris balica), the Javan tiger (Panthera tigris sondaicus), and the Caspian tiger (Panthera tigris virgata).

EVOLUTION OF TIGERS
Modern-day tigers evolved in Asia. Early tiger fossils have been found in China and Siberia.

The saber-toothed tiger (genus Smilodon) was not the ancestors of modern tigers. It led to branch of cat that were an evolutionary dead-end.

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