Tiger fossils in China show that tigers could have been around for 2 million years! 
Sunda tigers the smallest of five tiger subspecies were once found across several parts of the Sunda islands in Indonesia but today all remaining Sunda tigers are found only in Sumatra.
There are estimated to be fewer than 400 left in the wild.
Sumatran tigers have the narrowest black stripes of any tiger subspecies. This is because they are ambush predators in the Indonesian jungle and need to blend in amongst the thick vegetation.
They have a more bearded and maned appearance than other subspecies.
They have five different types of whiskers to pick up on vibrations their prey makes when moving through the jungle.
Unlike most of their cousins, tigers love swimming and will frequently cool off by having a dip in nearby rivers.