The bearded vulture (Gypaetus barbatus), also known as the lammergeier and ossifrage, is a very large bird of prey in the monotypic genus Gypaetus. The bearded vulture is the only known vertebrate whose diet consists of 70–90% bone.
Traditionally considered an Old World vulture, it actually forms a separate minor lineage of Accipitridae together with the Egyptian vulture (Neophron percnopterus), its closest living relative. It is not much more closely related to the Old World vultures proper than to, for example, hawks, and differs from the former by its feathered neck. Although dissimilar, the Egyptian and bearded vulture each have a lozenge-shaped tail—unusual among birds of prey. It is vernacularly known as Homa, a bird in Iranian mythology.
