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Lizards usually accompany dewlap movement with head bobs and other displays. The dewlap moves through extension and contraction. The muscles creating this movement are the ceratohyoid muscles and are connected to the hyoid apparatus in the throat and larynx area. [ 9 ]
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.
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]
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.
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 ...
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 scales of the head are much smaller in this lizard. [2] The dewlap is also sparsely scaled laterally and tucks under the heavily scaled skin of the throat, which is unique to this species. The mostly closely related lizards by similarity in features include A. fuscoauratus, A. Chloris, and A maculiventris. [3]
The dewlap has two to five (usually three or four) longitudinal rows of minute granular scales separated by bare skin. The colouring of this lizard is variable. The males are mainly yellowish-green or green with seven brown bands on the dorsal surface, a large dark spot on the shoulder and the limbs and tail banded transversely in dark brown.