caption: Slide 1 of 21: It's rare to see a photo of a wild animal, especially a tiger, unless it's from behind the bars of a cage in a zoo. There are nine species of tigers, but in the last 100 years alone, more than 93 per cent of their range has shrunk, which means that many today are bred in captivity. Those that are left in the wild roam only through the sweltering jungles of Asia, and in small parts of Europe, in Siberia's frigid mountains and forests. Here are the 20 most striking images of tigers in the wild that you need to see.