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.

Members of the weasel family, otters are known for their elongated bodies, webbed feet and playful antics, particularly their love of sliding down rocks, banks or waterfalls.

Turtles have been roaming the Earth for millions of years—but now dozens of these “slow and steady” species are racing toward extinction.