Male turkey bird with its red wattle.

The read flesh hanging from the neck of male turkeys is a type of caruncle called wattle.

The caruncle on top of the beak is called the snood.

A caruncle is a small, fleshy excrescence that is a normal part of an bird's anatomy. The turkey wattle is an example of caruncle.

For more information, read en.wikipedia.org/wiki/Wattle_(anatomy) and en.wikipedia.org/wiki/Caruncle_