Tigers (Panthera tigris) are the largest living members of the family Felidae, which includes all cats. Siberian tigers (P. t. altaica) are the largest and most massive of the eight recognized subspecies. They normally reach a weight of 660 lb (300 kg), with a record male that reached 845 lb (384 kg). Several of the subspecies have had their populations totally decimated and are probably extinct, mostly through direct human actions. The species' range, overall, has been greatly reduced in historic times. Currently, tigers are found in isolated regions of India, Bangladesh, Nepal, Bhutan, Southeast Asia, Manchuria, China, Korea, Russia, and Indonesia. Tigers are designated "endangered" by the U. S. Fish and Wildlife Service and by IUCN—The World Conservation Union. They are also listed in Appendix I of the Convention on International Trade in Endangered Species of Wild Fauna and Flora.

Unlike their relatives, the lion and the cheetah, tigers are...