Do thorny devils use their thorns to fight?

The thorny devil's thorns, or spikes, serve several functions. The thorny devil has thorns/spikes on its back that help it to ward off predators in its environment. It has an extra protuberance on the back of its head which may appear to be like a second head to would-be predators.

These spikes have another function, and that is to help channel water towards the thorny devil's mouth. Water which lands on the Thorny Devil's back, whether it be overnight condensation or rain, runs along tiny grooves on the animal's body to the corner of its mouth. It moves along these grooves by a capillary action set in motion by gulping. The Thorny devil will also rub itself up against vegetation in the early morning to collect condensation on its thorns.