The Komodo dragon is the world's largest lizard. They're big (they can be more than 12 feet long) and they're ugly! Komodo dragons are carnivorous, eating insects. birds, deer, horses, and even young Komodo dragons. The young can sometimes escape by climbing trees, because the heavier adults can't climb very well. Komodo dragons are good swimmers, however, and often hunt in the surf for fish and birds