Pete Oxford / Green Iguana (Iguana iguana) female in nest burrow, Banco Chinchorro, Yucatan Peninsula, Mexico

Pete Oxford / American Crocodile (Crocodylus acutus) nest excavated by nesting female Green Iguana (Iguana iguana), Banco Chinchorro, Yucatan Peninsula, Mexico

Pete Oxford / Green Iguana (Iguana iguana) male showing large dewlap, Banco Chinchorro, Yucatan Peninsula, Mexico

Pete Oxford / Green Iguana (Iguana iguana) male showing large dewlap, Banco Chinchorro, Yucatan Peninsula, Mexico

Andy Rouse / Galapagos land iguana (Conolophus subcristatus) walking towards camera, Urbina Bay, Isabela Island, Galapagos.

Andy Rouse / Galapagos land iguana (Conolophus subcristatus) feeding, Urbina Bay, Isabela Island, Galapagos.

Pete Oxford / Galapagos land iguana (Conolophus subcristatus) walking, South Plaza Island, Galapagos. Endemic.

Michael D. Kern / Common iguana (Iguana iguana) albino, captive, from Central and South America

Michael D. Kern / Albino Common Iguana (Iguana iguana) captive pair from Tom Crutchfield's collection, from Caribbean and South and Central America

Stephen Dalton / Close up of eye of Common green iguana (Iguana iguana)

Stephen Dalton / Close up of ear of Common green iguana (Iguana iguana) showing tympanic membrane

Michael Pitts / Common Iguana {Iguana iguana} clinging to floating tree branch, Eastern Seaboard of Panama