Dewlap Dewlap A dewlap is a longitudinal flap of skin that hangs beneath the lower jaw or neck of many vertebrates. While the term is usually used in this specific context, it can also be used to include other structures occurring in the same body area with a similar aspect, such as those caused by a double chin or the submandibular vocal sac of a frog. In a more general manner, the term refers to any pendulous mass of skin, such as a fold of loose skin on an elderly person's neck, or the wattle of a bird. Dewlaps can be
Sri Lanka hanging parrot have a faint blue throat. They have orange beaks and brown irises. Sri Lanka hanging parrot is less gregarious than some of its relatives, and is usually alone or in small groups outside the breeding season. Its flight is swift and direct, and the call is a sharp whistled "twiwittwit..twitwitwit". It undergoes local movements, driven mainly by the availability of the fruit, seeds, buds and blossoms that make up its diet. Sri Lanka hanging parrot is a bird of open forest. It is strictly arboreal, never descending to the ground. It nests in holes in trees, laying 2–3 eggs. In