A dewlap is a longitudinal skin fold that hangs beneath the lower jaw or neck of many vertebrates. While this term is commonly used in this particular context, it can also be used to insert other structures that occur in the same area of ​​the body with the same aspect, as caused by double chin or submandibular vowel pockets of frogs. In a more general way, this term refers to the mass of the fruity skin, such as loose skin folds in the neck of a parent, or a bird's nest. Dewlaps can be considered as caruncle , defined as "the tiny bumps that are the normal part of animal anatomy".
Video Dewlap
Mammals
Many mammals such as dogs, rabbits, and deer have dewlap. In a zebu cow, dewlap is a colloquially known as "folding suitcase". The dewlap is also found in female rabbits, such as the New Zealand white rabbit. When pregnant, the female rabbit will remove the fur from the dewlap to make a nest for her baby. Although these masses can be called dewlaps, they are formed by stored fat. The dewlap is also seen in both types of deer.
Maps Dewlap
Reptiles and birds
Many reptiles have dewlaps, especially anole lizard species, which have large dew that can lengthen and pull back. Anole species have been found to have an enhanced vision for color perception and depth. This species is able to see dewlap colors from a distance, giving the use and importance of dewlap. These dewlaps usually have a different color than the rest of the body and, when enlarged, make the lizard look much larger than it really is. The dewlap is mainly used when showing territorial boundaries and for men to attract females during the breeding season. Research has found that the pigments that produce this color are pterine and carotenoids. Both pigments are most often seen through the anole eye. Pterin and carotenoid pigments are located throughout the dewlap tissue, creating a yellow and red color. Lizards usually accompany their dewlap movements with head bobs and other displays. The dewlap moves through extension and contraction. The muscles creating this movement are known as ceratohyoid muscles connected to the hyoid apparatus. These muscles control the movement of dewlap around the throat and larynx. This is also where the motorneuron, a neuron signifying the dewlap movement, is found. Although many uncertainties are in the vicinity of this display destination, dewlap colors and head bobs are considered as a means of contrast background noise.
Many birds also have dewlap, such as pet chicken, some cracid and some guan.
See also
- Top
- Double chins
- Neck frill
- Gelambir
References
External links
- Media related to Dewlaps on Wikimedia Commons
- Weldon Owen Pty Ltd. (1993). Animal Encyclopedia - Mammals, Birds, Reptiles, Amphibians. Reader's Digest Association, Inc. ISBNÃ, 1-875137-49-1
Source of the article : Wikipedia
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