Loose skin hanging under the neck on some animals

A dewlap is a flap of skin that hangs beneath the neck of many animals. It can also be used to mean other things such as a double chin on a person or the vocal sac of a frog. The term dewlap can also be used to mean a caruncle, defined as "a small, fleshy excrescence that is a normal part of an animal's anatomy".[1] At times the appearance of a dewlap indicates a stage in an animal's development. For example, the appearance of a dewlap on a female rabbit indicates she is of breeding age.[2]

A lizard with a dewlap


  1. "Definition of caruncle". Retrieved April 20, 2013.
  2. Jen Davis. "What Is The Purpose of A Dewlap On A Rabbit?". WHALEROCK DIGITAL MEDIA, LLC. Retrieved 1 February 2016.