What is a "wattle"?

A wattle is a distinctive feature found in many birds and some animals, characterized by a fleshy, often elongated, and often brightly colored appendage or fold of skin. It typically hangs from the neck or head region and serves various purposes. In birds, wattles can play a role in communication and display, serving as visual signals during courtship or aggressive interactions. They can also have thermoregulatory functions, helping to dissipate excess heat or conserve warmth. The size, shape, and coloration of wattles can vary significantly between species, and they contribute to the overall appearance and uniqueness of the animal.