Sheep are quadrupedal, ruminant mammals typically kept as livestock. Like all ruminants, sheep are members of the order Artiodactyla, the even-toed ungulates. Although the name “sheep” applies to many species in the genus Ovis, in everyday usage it nearly always refers to Ovis aries. Numbering a small over one billion, domestic sheep are also the most numerous species of sheep. lamb.mp3 (153 downloads) lamb_little.mp3 (162 downloads)