Calumma nasutum (Duméril & Bibron, 1836)

Common and Scientific Name

The big-nosed chameleon, with the scientific name Calumma nasutum (Duméril & Bibron, 1836), is one of the smallest arboreal chameleons, and usually reaches a total body length of 11 cm.

Nasal Appendage Origin of Name

It gets its common name from the large, paddle-like appendage that sticks out from its nasal area.

Sexual Dimorphism of Nasal Appendage

It is thought that males have a larger, more square-shaped version of this flexible appendage, which is used to identify potential mates.

Male Head Crest Trait

A more prominent casque, or bony head crest, is another trait that distinguishes male big-nosed chameleons.

Typical Skin Coloration

Both sexes usually have brown, reddish-brown, tan, or light green skin.

Female Non-Receptive Mating Color Pattern

When females are not receptive to mating, they quickly develop a striking pattern of whitish-blue to turquoise spots on the sides of their nasal appendage and the top of their head.

Shared Chameleon Morphological Features

Like other chameleon species, the big-nosed chameleon has characteristic features including a prehensile tail, fused toes, turret-like eyes, and an extremely long tongue.

Habitat Types

This species lives in primary forest, forest edge, and secondary forest habitats, where it occupies low vegetation.

Microhabitat Preference

It prefers thin trees, shrubs, and bushes, but can also be found on thick lianas in dense rainforest, generally staying 1 to 2 meters above the ground.

Habitat Avoidance

It is only very rarely found in open terrain, and favors dense foliage and deep rainforest.