Frilled lizard

Overview

The frilled lizard has a slender body, long tapering tail and a large folded skin collar around its neck. Muted grey and brown body markings contrast with variable yellow or orange in the frill. Unlike many imagined dragons, it lacks a dorsal spine crest.

It spends much time on trees, descending to forage and move between perches. The Australian Museum’s Weipa treatment describes a diurnal ambush predator feeding chiefly on invertebrates. Occasional plant or vertebrate fragments in stomachs do not establish an important regular food category.

Shine’s observations of free-ranging animals and museum specimens identify social signalling and predator deterrence as major frill uses. Gliding, food storage and auditory enhancement were not supported. This is a display structure with studied behavioural functions, rather than an arbitrary theatrical ornament.

Origins & earliest records

An agamid lizard named Chlamydosaurus kingii. Northern regional occurrence and colour variation do not by themselves demonstrate additional species.

Evidence & interpretation

Cameron and Cogger provide a regional species account; Shine’s accessible primary abstract bounds the functional inference to its observations. The image’s partly opened frill and posture are interpretive rather than a photograph of a studied display.

Selected bibliography

Documented works and useful reading. This is not a list of every appearance.

1. 01

   The herpetofauna of the Weipa region, Cape York Peninsula

   E. E. Cameron and Harold G. Cogger · 1992

   Indexed regional species treatment.

2. 02

   Function and evolution of the frill of the frillneck lizard, Chlamydosaurus kingii

   Richard Shine · 1990

   Accessible primary abstract; no purchased fulltext.

Family, evolution & connections

Taxonomic classification

A hierarchy of classified groups, not a chain of direct ancestors.

Source note: Museum species treatment used; regional observations not extrapolated to every population.

1. ClassReptilia
2. OrderSquamata
3. FamilyAgamidae
4. GenusChlamydosaurus
5. SpeciesChlamydosaurus kingii

References

Sources supporting this profile. Linked pages have their own scope and editorial standards.

1. ResearchThe herpetofauna of the Weipa region, Cape York PeninsulaResearch access: 2026-10-10
2. ResearchFunction and evolution of the frill of the frillneck lizard, Chlamydosaurus kingiiResearch access: 2026-10-10

Image credits

Frilled lizard - AI-generated scientific interpretation.

Modern AI-generated scientific illustration. Diagnostic external features follow selected sources; pose, individual pattern and fine details are interpretive. Not photography or independent anatomical evidence.