The endangered specie...

There are several different types, or subspecies, of tigers, and their names reflect where they live geographically. Pressures from illegal killing, or poaching, and habitat loss have already driven three tiger subspecies to extinction while the remainder are threatened with the same fate. Tigers belong to the cat family, and are the biggest of the big cats, a group which includes lions, jaguars and leopards.
Although there is some variation in size among the subspecies, males generally measure about 11 feet from their nose to the tip of their tail and weigh about 400 pounds. Females are slightly smaller measuring a little more than 8 feet and weighing about 300 pounds. Males also have ruffs of hair around their cheeks.
Like housecats, tigers have retractable claws. They can pull their claws into a protective sheath to prevent them from becoming worn down while walking on rocks or hard ground they also try to keep them very sharp.

Tiger, Wildlife