George McCarthy / Chuckwalla Lizard (Sauromalus obesus) in breeding colours, Arizona, USA

John Cancalosi / Mountain Spiny Lizard / Yarrow Spiny Lizard (Sceloporus jarrovii), Chiricahua Mountains, Arizona, USA

John Cancalosi / Mountain Spiny Lizard / Yarrow Spiny Lizard(Sceloporus jarrovii) with blue throat (male), Chiricahua Mountains, Arizona, USA.

John Cancalosi / Regal horned lizard. {Phrynosoma solare} Sonoran desert, AZ, USA

Doug Wechsler / Zebra tailed lizard sunning {Callosaurus draconoides} Organ Pipe Cactus NM, Arizona, USA

John Cancalosi / Regal Horned Lizard {Phrynosoma solare} pair mating, Arizona, USA.

John Cancalosi / Regal Horned Lizard {Phrynosoma solare} pair mating, Arizona, USA.

RHONDA KLEVANSKY / Iguanid on saltmarsh {Liolaemus fabiani} feeds on saltflies, Atacama desert, San Pedro, Chile

David Welling / Texas horned lizard {Phrynosoma cornutum} Texas, USA

Dave Watts / San Lucan / Blue Rock Lizard sunning on rock(Petrosaurus thalassinus) Arizona, USA

Bernard Castelein / Land iguana with cactus {Conolophus subcristatus} Plaza, Galapagos

Joel Sartore / Photo Ark / Santa Catalina Island desert iguana (Dipsosaurus catalinensis) portrait, Los Angeles Zoo. Captive, occurs in Mexico.