Caruncle (bird anatomy) Caruncle (bird anatomy) A caruncle is defined as 'a small, fleshy excrescence that is a normal part of an animal's anatomy'. Within this definition, caruncles in birds include wattles (or dewlaps), snoods, and earlobes. The term caruncle is derived from Latin 'caruncula', the diminutive of 'carō', flesh. Caruncles are carnosities, often of bright colors such as red, blue, yellow or white. They can be present on the head, neck, throat, cheeks or around the eyes of some birds. They may be present as combs or crests and other structures near the beak, or, hanging from the throat or neck. Caruncles
Chicken or the egg distinction. Whatever criteria one chooses, an animal nearly identical to the modern chicken (i.e., a proto-chicken) laid a fertilized egg that had DNA identical to the modern chicken (due to mutations in the mother's ovum, the father's sperm, or the fertilised zygote). Put more simply by Neil deGrasse Tyson: "Which came first: the chicken or the egg? The egg—laid by a bird that was not a chicken." It has been suggested that the actions of a protein found in modern chicken eggs may make the answer different. Chickens produce a protein, ovocleidin-17 (OC-17), that is expressed in the uterus and