Restricted to submontane forests below 100m, and found in forested areas and plantations. Widely distributed, but apparently patchily distributed, in the central hills of Sri Lanka, including Knuckles, Kotmale, Sinharaja, Talawakele, Hanguranketha, Kanneliya, Galle, Kandy, Dambulla, Peradeniya, Namunukula, and Gampola.
Head long. Tail long. A series of spines on nape make up the dorso-nuchal crest in males. Enlarged scales on dorsum of the body. Midbody scale rows 33-39. Ventral scales as large as those on flanks. Forehead pale brown, with pale inter-orbital bands. Dorsum pale gray with dark gray bands, numbering four on the body. Limbs and tail similarly dark-banded.
Unusual among agamid lizards is its habit of uttering a high-pitched whistle when alarmed. It feeds on insects and ants. Gravid females are seen between July–August.
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