A rare orange coloration of a female Trioceros deremensis, Amani, E Usambara Mts., Tanzania

Orange colored female of T. deremensis

The Usambara three-horned chameleon is found at an altitude of 800–2,300 m (2,600–7,500 ft) in the East Usambara (there is a single old record from West Usambara but it is doubtful the species occurs there), Uluguru, Nguu, Nguru, and Udzungwa Mountains, with its range covering about 1,400 km2 (540 sq mi). Each subpopulation is isolated and the species occurs in forest interior and at edges, penetrating nearby hedges and plantations.

The typical coloration of females is green with darker shades, spots and markings, sometimes blac or white or yellow spots. Very rarely, the females are colored orange.

Normally colored females of T. deremensis