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
Vernal hanging parrot green patch. Vernal hanging parrot is a bird of dry jungle and cultivation. It nests in holes in trees, laying 2-4 white eggs. Immature birds have a duller rump, and lack the throat patch. Vernal hanging parrot is less gregarious than some of its relatives, and is usually in small groups outside the breeding season. Its flight is swift and direct, and the call is a raucous chattering. In Sri Lanka, it is replaced by the very similar endemic Sri Lanka hanging parrot, ("L. beryllinus"). Vernal hanging parrots nest in tree cavities. The nests are lined with fragments of leaves.