Depending on the species of tiger, there are only around 3,500 living in the wild worldwide. At this time, there are 3 extinct types of tigers and 6 that are on the endangered species list.
Facts about tigers:
An adult Amur or Siberian tiger (the largest subspecies) can weigh up to 660 pounds.
No two tigers have the same stripes. Like human fingerprints, their stripe patterns are unique to each individual. Stripes range in color from light brown to black and are not symmetrical on both sides of the tiger.
The average lifespan of a wild tiger is 10 - 15 years. But on rare occasion, they have been known to live up to 26 years in the wild.
Tigers are generally nocturnal hunters. Their night vision is up to six-times greater than ours. But they're also opportunists, which means they won't pass up the chance for a daytime snack when it's available.
A tiger's hind legs are longer than its front legs, giving them the ability to leap forward 20 - 30 feet in one jump.