Indonesia's Komodo dragons grow to 12ft long - their mouths are home to more than 50 different types of particularly unpleasant and poisonous bacteria. A slow and painful death resulting from septicaemia awaits an escaped bite victim. The dragon, using its keen sense of smell, will follow escaped prey until it succumbs to blood poisoning. Komodo dragons often hunt in groups, ripping their prey to shreds. They are mostly scavengers and seldom attack humans.