How does a thorny devil protect itself and survive in its habitat?

The thorny devil's scales change color due to seasonal changes. Also, differences in temperature affect them. This makes these animals seem almost invisible to predators, which gives them a better chance for survival. However, if they do get faced with a predator they tuck their heads under their body and reveal a "fake head." This is essentially a ball of spikes located behind their actual head. If a predator goes for this they get a mouthful of spines. So they have other defense mechanisms in addition to camouflage.