Monitor Lizards will eat almost anything. Fish, insects, birds, crabs, snakes—you name it! They even scale trees to raid nests or capture squirrels. But it's not every day that you find a giant lizard holding a Lesser-whistling Duck by its neck. Lesser-whistling Ducks are known to build nests in tree cavities and on the branches of large trees. Sometimes, even high up on a tree is just not high enough!