Blue-Legged Secrets: Calumma crypticum from Madagascar

Calumma crypticum, also known as the blue-legged chameleon, is a montane species endemic to Madagascar's rainforests. First described by Raxworthy & Nussbaum in 2006, it had long been confused with Calumma brevicorne until genetic and morphological differences confirmed its distinct status. The species name reflects its previously "cryptic" identity.

This chameleon inhabits elevations between 1000 and 1850 meters, with populations documented in Ranomafana, Andringitra, Andohahela, Tsaratanana, and the Anjozorobe region. Its coloration is generally cryptic, blending into mossy and humid forest environments, but the blue legs are a diagnostic feature that distinguish it from related taxa. Males possess a small rostral appendage, while females are more subtly patterned.

Picture courtesy Quinn Diaz