The Frill-necked Lizard

The Frill-necked Lizard, or Frilled Lizard also known as the Frilled Dragon, is so called because of the large ruff of skin which usually lies folded back against its head and neck. The neck frill is supported by long spines of cartilage, and when the lizard is frightened, it gapes its mouth showing a bright pink or yellow lining, and the frill flares out, displaying bright orange and red scales.

Frilled lizard
Image source: no-pest.com

More info: en.wikipedia.org

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