The only mammals who can both flap their wings and fly, bats play a key role in pollinating our crops and controlling insect populations in our neighborhoods.

Combine a bulbous snout with a prominent jaw, a body like a beer keg set on four stubby legs, and you have a hippopotamus.

They look like a deer crossed with a giant jack rabbit; with long, muscular tails and belly pouches, kangaroos are the world’s largest marsupial.