What is the fleshy outgrowth on top of a chicken's head called?

The fleshy outgrowth on top of a chicken's head is called a comb. The comb is a prominent feature that varies in size and shape among different breeds of chickens. It can serve several purposes, including helping to regulate body temperature and playing a role in social signaling among chickens. The comb also plays a part in determining the health of a chicken, as a vibrant, red comb is often an indicator of good health.

The other terms refer to different parts of a chicken's physiology. The crest refers to a tuft of feathers on the head, while the wattle is a flap of flesh that hangs under the chin. The beak is the hard, pointed mouthpart used for pecking and eating. Understanding these distinctions helps in identifying the various anatomical features of chickens, particularly in the context of poultry management and breeding.