Afghanistan has long been known for diverse wildlife. Many of the larger mammals in the country are categorized by the International Union for Conservation of Nature (IUCN) as globally threatened. These include the snow leopard, Marco Polo sheep, Siberian musk deer, markhor, urial, and the Asiatic black bear. Other species of interest are the ibex, the gray wolf, and the brown bear, striped hyenas, and numerous bird of prey species. Most of the Marco Polo sheep and ibex are being poached for food, whereas wolves, snow leopards and bears are being killed for damage prevention.