Dewlap
목부채
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<speciesfyi-glossary slug="dewlap"></speciesfyi-glossary>Definition
A flap of skin extending from the throat of some lizards, used in territorial displays and courtship signaling.
Detailed Explanation
The dewlap's color and movement pattern encode species identity and individual quality — green anole males extend their bright red dewlap in a characteristic display sequence. Females assess dewlap size, color saturation, and display rate when choosing mates. Dewlap coloration reflects carotenoid availability in the diet, making it an honest signal of foraging quality. Environmental light conditions on islands with different canopy cover have driven divergence in dewlap color between populations.