A female sheep is called a ewe, and a young female is called a ewe lamb. A male sheep is called a ram, and a young male is called a ram lamb.
Sheep have a thick coat of fleece on their bodies, and they have hooves that are divided into two toes. Not all rams have horns, but when they do, the horns are curved outwards. The average lifespan of a sheep is seven years. The largest sheep is the Argali, which lives in the Altai Mountains of Siberia and Mongolia. Wild sheep can climb mountains. Male sheep can grow up to 4 feet tall depending on the species.