Ngalyod, the rainbow serpent, is one of the most important ancestor spirits of western Arnhem Land and lives in the area south and east of Gunbalanya (formerly Oenpelli). Images of Ngalyod appear in rock paintings of the region that are over 20,000 years old. Ngalyod is much feared and can destroy anyone who breaks the law. Children who wander away from the camp are likely to be taken by its spirit that lives waterholes and rock shelters. Ngalyod takes a variety of forms and only Kuninjku men of senior ceremonial status can paint this image. While stylistic variations of Ngalyod may occur, rules are adhered to in painting this and other images. Artists can only paint the ancestors to which they have inherited rights through their father. Ancestors like Ngalyod must be painted ‘accurately’ and exhibit a range of figurative elements. For example, the rainbow serpent may be painted with elements of a kangaroo such as the ears or head. The use of cross-hatching or rarrk indicates the sacred or ceremonial associations of the ancestor and colours must be applied in the correct order. Ngalyod devours a hunter was painted by Njiminjuma at Mumeka outstation in December 1979. It typifies the style of Kuninjku painters from Mumeka who use a complex of intricate cross-hatching patterning or rarrk to infill the entire body of the ancestor. This painting depicts the story of a hunter who had speared a kangaroo that was in fact the rainbow serpent. Changing back into the original form of the serpent, Ngalyod devours the hunter. The head and a leg joint are shown on the right.