Andean condors are large scavenging birds. Their wingspan averages nine to 10 feet. Andean condors are sexually dimorphic (have two distinct gender forms); males are slightly larger than females, have brown eyes and a caruncle (a fleshy comb) on top of the head; females have red eyes and no caruncle. The neck, feet, and legs of Andean condors are unfeathered. Adult plumage is black with grayish-white upper wing patches and a downy white ruff around the base of the neck. Skin is a light gray shaded slightly with pink or red. Juvenile plumage is a dark grayish-brown with a dark gray head and neck. Andean condors have a strong, sharp, hooked bill that is a creamy-tan color. Their feet and legs are gray with black nails. Their feet are used for locomotion and holding prey down while ripping it apart with the beak, rather than strongly grasping onto things.