A domestic rabbit or domesticated rabbit (Oryctolagus), more commonly known as simply a rabbit, is any of the domesticated varieties of the European rabbit species. Rabbits were first domesticated in the Middle Ages and are used as sources of food, fur, and wool, as research subjects, and as pets. The male is called a buck and the female is a doe; a young rabbit is a kitten, kit, bunny or even pup. Rabbits sleep with their eyes open.