Regal Horned Lizard

The regal horned lizard is a small, flat lizard about the size of the palm of a human's hand. It has spikes all around the lateral surface of its body. It is 3–4 in (117 mm) in length from nose to tail as a full adult, and pale grey to yellow-brown or reddish in color, topped with dark blotches alongside the body and back. Its four legs each have five toes with a claw on each toe. The species is a slow runner that uses camouflage to escape predators.

This lizard can be found across southeastern Arizona and along the transition of the southern zone of the central mountains region.

Their diet consists almost exclusively of harvester ants and can eat 2500 ants in one meal. They are slow eaters because they spend most of their time in the intense heat of the desert during meals. They have been observed consuming some other insects and spiders.