They could be seen wearing standard armoured Anbu uniform or, in some instances (such as Haku and Ao), a blue kimono with a striped, turtle-necked undershirt. They may also wear a mask with thin slitted eye-hole and a wavy design in place of the mouth, and their village symbol on the forehead. Their masks have human resemblances, rather than the typical animal resemblance most Anbu masks possess. They kill their target, taking the head as proof, and then completely dispose of the body by using various methods, such as cremation or the summoning of wild carrion crows to devour the corpse. This is done in order to make sure the village secrets which a ninja's body holds — such as chakra types, herbs eaten, ninjutsu, special medicine, and kekkei genkai — will not be revealed to outsiders.