Biomechanics of the stick insect antenna: Damping properties and structural correlates of the cuticle

► The antenna consists of stiff exocuticle with an inner wedge of soft endocuticle. ► Damping is stronger at the base of the antenna. ► After experimental desiccation, the antenna becomes under-damped. ► The antenna's cuticle properties are structural correlates of damping. ► The biomechanical properties allow for straight posture and a maximum of flexibility.