Chris Mattison / Northern Alligator Lizard (Gerrhonotus coeruleus) Golden Bluffs, California, USA, June.

Chris Mattison / Southern Alligator Lizard (Gerrhonotus multicarinatus) San Jose, California, USA, June.

Chris Mattison / Southern Alligator Lizard (Gerrhonotus multicarinatus) in leaf litter, San Jose, California, USA, May.

MYN / Les Meade / Northern Alligator Lizard (Elgaria coerulea principis) Washington, USA, Meetyourneighbours.net project.

Chris Mattison / Cedros Island alligator lizard (Elgaria cedrosensis) Cedros Island, Baja California, Mexico

MYN / David Hunter / Southern Alligator Lizard (Elgaria multicarinata webbii). San Joaquin River Gorge, Auberry California, May. meetyourneighbours.net project

MYN / David Hunter / Southern Alligator Lizard (Elgaria multicarinata webbii). San Joaquin River Gorge, Auberry California, May. meetyourneighbours.net project

MYN / David Hunter / Southern Alligator Lizard (Elgaria multicarinata webbii) head profile. San Joaquin River Gorge, Auberry, California, May. meetyourneighbours.net project

Daniel Heuclin / Arizona / Madrean Alligator Lizard (Elgaria kingii nobilis) basking on a rock. Controlled conditions. Chiricahua mountains, Arizona, USA, August.

John Cancalosi / Close up head portrait of Southern Alligator Lizard (Elgaria multicarinata) Oregon, USA, captive

John Cancalosi / Portrait of Southern Alligator Lizard (Elgaria multicarinata) Oregon, USA, captive

Edwin Giesbers / Southern alligator lizard {Elgaria multicarinata} captive, from USA