Mammals are vertebrate animals constituting the class Mammalia, and characterized by the presence of mammary glands which in females produce milk for feeding their young, a neocortex, fur or hair, and three middle ear bones........continue

Humans, gorillas, rats, mice, platypuses, kangaroos, tree kangaroos, dogs, cats, whales, dolphins, cheetahs, lions, tigers, hyenas, wolves, wolverines, hedgehogs, cows, bats, pigs, monkeys, donkeys, mules, horses, sheep, goat, deer, moose, antelope, gibbons, porpoises, seals, sea lions, sea otters, koalas, anteaters.