Daniel Heuclin / Gila monster (Heloderma suspectum suspectum) controlled conditions, Catalina mountains foothills, Arizona USA

Daniel Heuclin / Gila monster (Heloderma suspectum) eating eggs, Near Tucson, Arizona, USA captive

Daniel Heuclin / Man photographing Gila monster (Heloderma suspectum suspectum) controlled conditions, Organ Pipe Cactus Monument, Arizona USA

Barry Mansell / Gila Monster (Heloderma suspectum) in banded phase. Arizona, USA, September.

Daniel Heuclin / Gila monster (Heloderma suspectum) studio shot, captive, from Arizona, USA

Pete Oxford / Gila Monster (Heloderma suspectum) flicking tongue, native to the southwestern United States and northwestern Mexico

John Cancalosi / Gila monster (Heloderma suspectum) Sonoran desert, Arizona, USA

John Cancalosi / Gila monster (Heloderma suspectum) at entrance to burrow, Sonoran desert, Arizona, USA

John Cancalosi / Gila monster (Heloderma suspectum) defensive behaviour, Sonoran desert, Arizona, USA

John Cancalosi / Gila monster (Heloderma suspectum) Sonoran desert, Arizona, USA

Michael D. Kern / Gila monster (Heloderma suspectum) in habitat, USA

Michael D. Kern / Gila monster (Heloderma suspectum) USA