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Comments: Males are more colorful.
Chuckwallas prefer lava flows and rocky areas, such as those found in the Sonoran and Mojave Deserts. These areas are typically vegetated by creosote bush and other such drought-tolerant scrub. The lizards may be found at elevations of up to 4,500 feet.

Primarily herbivorous, Chuckwallas feed on leaves, fruit and flowers of annuals and perennial plants; insects represent a supplementary prey. The lizards are said to prefer yellow flowers, such as those of the brittlebush (Encelia farinosa).

Harmless to humans, these lizards are known to run from potential threats; a tight rock crevice is sought wherein the Chuckwalla will inflate its body with air in order to entrench itself. Source: Wikipedia