Rabbits are small mammals with fluffy, short tails, whiskers and distinctive long ears. There are about 30 species of rabbits around the world, and while they live in many different environments, they have many things in common.
While many people think rabbits are about the size of a cat, some rabbit species, such as the jackrabbit, can grow to be as big as a small child. Small rabbit species can be as little as 8 inches in length and weigh less than a pound. Larger rabbits grow to 20 inches and more than 4 pounds.