These creatures are called psychopomps, from the Greek word ψυχοπομπός (psychopompos), literally meaning the "guide of souls". Their role is not to judge the deceased, but simply provide safe passage. Frequently depicted on funerary art, psychopomps have been associated at different times and in different cultures with horses, whippoorwills, ravens, dogs, crows, owls, sparrows, harts, and dolphins.