
Appearance
Male big-nosed chameleons can also be distinguished by the more pronounced casque, a bony head crest. The skin of both sexes is usually a shade of brown, reddish-brown, tan, or light green, with females not receptive to mating rapidly developing a striking display of whitish-blue to turquoise spots on top of the head and on the sides of the nasal appendage. Like other chameleons, this big-nosed species has a prehensile tail, fused toes, distinctive turret-like eyes and an impressively long tongueSource: http://www.arkive.org/big-nosed-chameleon/calumma-nasutum/image-G26410.html
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