Prolegs in the body of the world’s largest moth (dark colour), the Atlas moth (Atticus atlas), support the caterpillar in hanging upside down on a twig. Meanwhile, the smaller thoracic legs can ...

Photograph of an Attacus atlas caterpillar depicting the differences between the thoracic legs, which are uniramous (have one branch) and end in a single claw, and the prolegs, which are fleshy ...