Most bats patrol the night sky in search of insects. New World leaf-nosed bats take a different approach. Among the more than 200 species of leaf-nosed bats, there are those that hunt insects; drink nectar; eat fruit; munch pollen; suck blood; and prey on frogs, birds, lizards and even other bats. They're among the world's most ecologically diverse mammals, and until recently, it was thought they originated in South America.