 Appearing frequently on funerary art, psychopomps have been depicted at different times and in different cultures as anthropomorphic entities, horses, deer, dogs, whip-poor-wills, ravens, crows, vultures, owls, sparrows, and cuckoos.When seen as birds, they are often seen in huge masses, waiting outside the home of the dying.Classical examples of a psychopomp are the ancient Egyptian god Anubis, the god Yama in Hinduism, the Greek ferryman Charon and god Hermes, the Roman god Mercury, the Norse Valkyries, the Aztec Xolotl, and the Etruscan Vanth.