Although its coloration generally serves as camouflage against predation, when threatened by a predator, a horned lizard will puff up and become very fat, which causes its body scales to protrude, making it difficult to swallow.
Although its coloration generally serves as camouflage against predation, when threatened by a predator, a horned lizard will puff up and become very chubby; or as the scientist say it, fat. Its cause's its body to become spiny scales to protrude, making it difficult to swallow.