Iguana Anatomy: A Visual Field Guide

Head and mouth

The head carries the eyes, nostrils and mouth as well as structures involved in visual signaling. Iguanas have teeth adapted to processing food rather than mammal-like chewing.

Dewlap

The expandable flap beneath the throat is highly visible and functions in visual display. It can be extended during social and territorial signaling.

Dorsal spines

The row of spines along the back and tail contributes to the characteristic silhouette of many iguanas.

Tail

The long tail aids balance and swimming and can be used defensively. Green iguanas can lose part of the tail through autotomy and later regrow a replacement, although the regenerated section is not an exact copy of the original.

Feet and claws

Strong limbs and claws support climbing. Green iguanas are highly capable climbers, while species such as marine iguanas use powerful claws on rocky shorelines.

Keep exploring

Iguana facts become more useful when anatomy, behavior, species and habitat are connected instead of treated as isolated trivia.