Vulture is a large raptor belonging to the family Aquilidae in the order Aquiformes. The head and neck of adult birds are partially exposed, with brown down feathers from the forehead to the occipital region; There are sparse black hair like down feathers around the head, eyes, and ears, and exposed eyebrows and neck; Blue gray skin with needle like clusters of feathers at the base of the neck; The body feathers are dark brown, and the flying feathers are black brown; Iris dark brown, beak strong; The young bird resembles an adult but has a darker body color and a more exposed head. Because its head is covered in feathers and there is a partially bare bald area behind its neck, it is called a vulture. In Xizang, China, there is a kind of funeral called "celestial burial", which means that human bodies are placed in the wild and eaten by vultures, which is closely related to the local culture.