Madagascan chameleon Chamaeleo verrucosus being shown its reflection in a mirror in order to elicit a threat response (see photo number Z750/135). Chameleons have several anatomical peculiarities in addition to their well-known ability to change colour. The eyes can be moved independently, and are covered by a cone-shaped scaly lid. The tongue has a sticky, clublike tip & can be shot out to a length equal to that of the body, enabling the chameleon to capture prey at a large distance. The toes of each foot are fused into two opposed groups & the tail is prehensile, both adaptions for arboreal life.