The chuckwalla belongs to the iguana family of animals. Chuckwallas are petite, averaging just 6.4 inches in length, but adults can reach lengths of over 15 inches. To escape predators, they take shelter in small holes and crevices, inflating its lungs and expanding its skin to wedge itself into place. The colors of a chuckwalla further help it camouflage and blend into its surroundings. These lizards burrow in crevices to hibernate during the winter as well.