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Camels are a mammal of the Camelidae family. Camels form the genus Camelus. There are three living species of camels. Best-known are the dromedary (one hump) and bactrian (two humps) camels.

The camelids, as a family, include the "New World" camelids: the llama, the alpaca, the guanaco, and the vicuña.

The earliest known camel, called Protylopus, lived in North America 40 to 50 million years ago, during the Eocene. It was about the size of a rabbit and lived in the open woodlands of what is now South Dakota.