Tigers are illegally hunted for their bones and internal organs, which are used for medicinal purposes. In the past, poaching was primarily for furs. Hunting both by day and at night, tigers feed on wild pigs, wild cattle and deer, and occasionally hunt rodents, birds, fish and frogs. A tiger may go for days without eating, but when it does catch its prey, it can eat more than 80 pounds at once. Zoo tigers eat commercially produced carnivore diet.
Sumatran tigers comprise one of the smaller sub-species, whereas Siberians are the largest.
Male tigers outweigh females by about 100 pounds or more. Gestation period is 100 days. Two to four cubs are born at once. They are born blind and depend on their mother for food. Within 11 months, they begin hunting on their own.