The Siberian tiger, also known as the Amur tiger, is the largest subspecies of tiger. Siberian tigers are found primarily in the birch forests of Siberia, eastern Russia, China and North Korea. Siberian tigers are considered an endangered species, and scientists estimate that there are only about 400 to 500 of these cats left in the wild.

The Siberian tiger averages 11 feet in length, with the tail measuring an additional foot. Male tigers can weigh up to 700 pounds, while females can weigh up to 400 pounds. Siberian tigers are carnivores whose main prey is deer, elk, boars and bear, though they also hunt smaller animals such as rabbits and fish. They can eat up to 60 pounds of food per day.

Tigers are territorial and live alone. A tiger litter typically consists of two to six cubs who stay with their mother for two to three years. The cubs begin to learn to hunt at three months and are able to hunt on their own at 18 months.

Siberian tigers are threatened by habitat loss and hunting, especially because their body parts are used in traditional Chinese medicine and healing. Conservation efforts include work by the World Wildlife Fund to protect their prey species and to sustainably manage their forest habitat.