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A mastiff with a dewlap, seen connecting from the neck to the lower jaw. A dewlap is a longitudinal flap of skin or similar flesh that hangs beneath the lower jaw or neck of many vertebrates . More loosely, it can be various similar structures in the neck area, such as those caused by a double chin or the submandibular vocal sac of a frog .
Anoles are small to fairly large lizards, typically green or brownish, but their color varies depending on species and many can also change it. [1] [7] In most species at least the male has a dewlap, an often brightly colored flap of skin that extends from the throat and is used in displays. [7]
Lizards have evolved several modes of communication, including visual, chemical, tactile, and vocal. [9] [2] Chemical and visual communication are widespread, with visual communication being the most well-studied, while tactile and vocal communication have traditionally been thought to occur in just a handful of lizard species; however, modern scientific techniques have allowed for greater ...
Lizard is the common name used for all squamate reptiles other than snakes ... signalling with its extended dewlap. Lizards signal both to attract mates and to ...
Dewlap extension occurs alongside a number of behaviors exhibited by the brown anole, namely during courtship. [34] In an experiment by Richard Tokarz, an experimental group of male brown anoles underwent a surgery that rendered them unable to extend their dewlaps; a control group of male anoles were subject to the same surgery, but without the ...
The color of the dewlap is variable and different from the lizard eye to the human eye. Green anoles are thought to be capable of seeing a larger range of the UV spectrum, and that the dewlap reflects ultraviolet light to attract mates. [8] Female anoles do, however, often have a dorsal line down their back.
Iguanas are large lizards that can range from 1.2 to 2.0 m (4 to 6.5 ft) in length, including their tails. They possess a dewlap and a row of elongated scales running from the midline of their necks down to their tails.
The green iguana is a large lizard and is probably the largest species in the iguana family, though a few in the genus Cyclura may match or exceed it in weight. [31] Adults typically grow to 1.2 to 1.7 m (3.9 to 5.6 ft) in length from head to tail. [ 8 ]