Cockscombs are the fleshy, brightly colored crests found on the heads of certain birds, such as roosters and turkeys. The term 'cockscombs' is derived from the resemblance of these crests to the comb of a rooster. Cockscombs are made up of a network of veins and arteries that provide oxygen and nutrients to the crest. They are used for display purposes, such as courtship and territorial defense.