The adult King Vulture is the most strikingly coloured of the New World vultures. It is predominantly white, though its ruff, flight, and tail feathers range from grey to an opalescent black. The white plumage also has a slight rose-yellow tinge to it. It has a thick, strong bill that, whilst the most powerful among the New World vultures, is quite small compared to that of other large birds of prey. This bill has a hooked tip and a sharp cutting edge. The bird has broad wings and a short, broad, and square tail. Its eyes are straw-coloured and it has keen eyesight. Unlike some New World vultures, the King Vulture lacks eyelashes. The King Vulture also has a highly noticeable yellow fleshy crest on its orange and black bill; this caruncle does not fully form until the birds fourth year. It also has grey legs and long, thick claws. The vulture is minimally sexually dimorphic, with no difference in plumage and little in size between males and females. The juvenile vulture has a dark bill and eyes, and a downy, grey neck that soon begins to turn the orange of an adult. Younger vultures are a slate grey overall, and, while they look similar to the adult by the third year, they do not completely molt into adult plumage until they are approximately five or six years of age