Fauna in Armenia is diverse given the country's relatively small geographic size, owing to the varied habitats created by the area's mountainous terrain.[1] Armenia is an important area for migratory animals; about 350 different bird species were recorded in the country. Many of the world's domesticated animals originated in the area Armenia is located in, and the mouflon, the ancestor of domesticated sheep, is present there. Research suggests that about a quarter of the animal species in Armenia are internationally endangered. The mouflons are suffering a great population decline due to poaching and habitat loss, and the Sevan trout, which made up thirty percent of the fish in Lake Sevan, have virtually disappeared.