History of the domestic sheep exact line of descent between domestic sheep and their wild ancestors is unclear. The most common hypothesis states that "Ovis aries" is descended from the Asiatic ("O. orientalis") species of mouflon. A few breeds of sheep, such as the Castlemilk Moorit from Scotland, were formed through crossbreeding with wild European mouflon. The urial ("O. vignei") was once thought to have been a forebear of domestic sheep, as they occasionally interbreed with mouflon in the Iranian part of their range. However, the urial, argali ("O. ammon"), and snow sheep ("O. nivicola") have a different number of chromosomes than other Ovis species,
Mouflon horned, while others are polled. The horns of mature rams are curved in almost one full revolution (up to 85 cm). Mouflon have shoulder heights around 0.9 m and body weights of 50 kg (males) and 35 kg (females). Today, mouflon inhabit the Caucasus, Anatolia, northern and eastern Iraq, and most parts of Iran and Armenia. The range originally stretched further to the Crimean peninsula and the Balkans, where they had already disappeared 3,000 years ago and came back to Bulgaria. Mouflon were introduced to the islands of Corsica, Sardinia, Rhodes, and Cyprus during the neolithic period, perhaps as feral