Roland Seitre / Grand Cayman Blue Iguana (Cyclura lewisi), adult that has been reintroduced to the wild from captive breeding programme. Endangered species.

Laurie Campbell / Slow worm (Anguis fragilis) female with newborn young on rock face, controlled conditions, Berwickshire, Scotland, July

Pete Oxford / Cuban rock iguana (Cyclura nubila) Jardines de la Reina National Park, Cuba, Caribbean

Andy Rouse / Two Marine Iguana (Amblyrhynchus cristatus) basking on a volcanic rock. Puerto Egas, Galapagos, September.

Tim Laman / Marine Iguanas (Amblyrhynchus cristatus) on the south coast of Espanola Island, Galapagos, Vulnerable species

Michele Westmorland / Cuban rock iguana (Cyclura carinata) walking in the sand, Iguana reserve on Little Water Cay, Turks and Caicos, Caribbean. Endangered

Wild Wonders of Europe / Ziegler / Peloponnese wall lizard (Podarcis peloponnesiacus) under rock, The Peloponnese, Greece, May 2009

Wild Wonders of Europe / Ziegler / Peloponnese wall lizard (Podarcis peloponnesiacus) on rock, The Peloponnese, Greece, May 2009

Wild Wonders of Europe / Ziegler / Peloponnese wall lizard (Podarcis peloponnesiacus) on rock in a typical village, Mani Peninsula, The Peloponnese, Greece, May 2009

Wild Wonders of Europe / Lilja / Roughtail rock agama / Stellion (Agama stellio) on branch, Akamas Peninsula, Cyprus, May 2009

Wild Wonders of Europe / Oxford / Iberian Wall Lizard (Podarcis hispanica) on rock, Sierra de Andjar Natural Park, Mediterranean woodland of Sierra Morena, north east Jan Province, Andalusia, Spain, April 2009

Kim Taylor / Male Namibian rock agama (Agama planiceps planiceps) portrait, Namibia, Africa

Michael & Patricia Fogden / Thorny Devil (Moloch horridus) in the desert near Ayers Rock, Uluru-Kata Tjuta National Park, Australia

Jim Brandenburg / Desert Spiny Lizard (Sceloporus magister) sunning on rock, Monument Valley National Monument, Arizona

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus) mature male clings to lava rock along shoreline, Academy Bay, Santa Cruz Island, Galapagos Islands, Ecuador

Larry Minden / Collared Lizard (Crotaphytus collaris) holding itself up off of hot rocks, Mojave Desert, California

Michio Hoshino / Galapagos Land Iguana (Conolophus subcristatus) sunning on rock, Galapagos Islands, Ecuador

Colin Seddon / Slow worm (Anguis fragilis) on rock. England, UK, Europe

Tony Heald / Southern savanna (Rock) monitor {Varanus albigularis} panting Etosha NP, Namibia

Roland Seitre / Indianapolis zoo worker holding a young Grand Cayman Blue iguana (Cyclura lewisi) from captive breeding program, Indianapolis zoo, Indiana, USA

Roland Seitre / Grand cayman blue iguana (Cyclura lewisi) attacking reflection in mirror, Indianapolis Zoo, Indiana, USA, Endangered species

Roland Seitre / Grand Cayman Blue Iguana (Cyclura lewisi), adult that has been reintroduced to the wild from captive breeding programme. Cayman Islands, Endangered species.

Roland Seitre / Grand Cayman Blue Iguana (Cyclura lewisi) hatchling and egg held in hands, captive, Cayman Islands National Trusts Blue Iguana Recovery Program, Queen Elizebeth Botanic Park, Grand Cayman. Endangered...

Roland Seitre / Grand Cayman Blue Iguana (Cyclura lewisi) captive Cayman Islands National Trusts Blue Iguana Recovery Program, Queen Elizebeth Botanic Park, Grand Cayman

Roland Seitre / Grand Cayman Blue Iguana (Cyclura lewisi) portrait, Cayman Islands, captive, endangered species

Roland Seitre / Cayman blue iguanas (Cyclura lewisi) in captive breeding program, Indianapolis Zoo, Indiana, USA, endangered species

Roland Seitre / Cayman blue iguanas (Cyclura lewisi) attacking its own image in mirror, captive, Indianapolis Zoo, Indiana, USA, Endangered species

Roland Seitre / Cayman blue iguana (Cyclura lewisi) reflected in mirror, captive, Indianapolis Zoo, Indiana, USA, Endangered species

Roland Seitre / Grand Cayman Blue Iguana (Cyclura lewisi) with mouth open defensively, Cayman Islands, captive

Juan Manuel Borrero / Illustration of threatened species of Spain : Blue whale (Balenoptera musculus), Brown bear (Ursus arctos), Spanish ibex (Capra pyrenaica hispanica), Bullhead (Cottus gobio), Iberian Rock Lizard (Lace...

David Welling / Yellow-backed spiny lizard (Sceloparus uniformis / magister) perches on a rock along Chalk Cliffs Road, Bishop, California United States

David Welling / Long-nosed leopard lizard (Gambelia wislizeni) perches on a large rock in Redding canyon, Inyo county, California, USA

David Welling / Male Great Basin or Desert collared lizard (Crotaphytus insularis bicinctores) sits on a rock outcrop in Redding canyon, Owens valley, Inyo county, California, United States

David Welling / Chuckwalla (Sauromalus obesus) basks on a volcanic rock near Eureka dunes, California

Chris Mattison / Weber's Gecko (Pachydactylus weberi) camouflaged against rock. Springbok, South Africa.

Kevin Schafer / Marine Iguana (Amblyrhynchus cristatus) on rock in water, Santiago Island, Galapagos Islands, Ecuador

Tui De Roy / Santa Fe land iguana (Conolophus pallidus) on rock next to cactus, Santa fe Island, Galapagos

Tui De Roy / Marine iguanas (Amblyrhynchus cristatus) basking on coastal volcanic rocks, matching the rock colours. Galapagos Islands, Ecuador, June.

Tui De Roy / Galapagos land iguana (Conolophus subcristatus) basking on volcanic rock. Isabela Island, Galapagos, Ecuador, June.

Roberto Rinaldi / Blue iguana (Cyclura lewisi) portrait, Grand Cayman, Cayman Islands, critically endangered species

Roberto Rinaldi / Blue iguana (Cyclura lewisi) portrait, Grand Cayman, Cayman Islands, critically endangered species

Roberto Rinaldi / Clouded rock iguana (Cyclura nubila) portrait, Cayman Islands, vulnerable species

Roberto Rinaldi / Clouded rock iguana (Cyclura nubila) portrait, Cayman Islands, vulnerable species

Barry Mansell / Brown anole (Anolis sagrei) female on rock. Introduced species Everglades National Park, South Florida, USA, May

Charlie Summers / Red-headed Rock Agama (Agama agama) sunning on a rock. The tip of its tail appears to be regenerating. Naabi Hill, Serengeti, Tanzania.

Kim Taylor / Spiny green lizard (Sceloporus malachiticus) basking on rock, Costa Rica

Sebastian Kennerknecht / Scorpion Gecko (Pristurus carteri) female camouflaged on rocks, Hawf Protected Area, Yemen

Ann & Steve Toon / Southern rock agama (Agama atra atra) camouflaged against rock, Northern Cape, South Africa, February

Daniel Heuclin / Desert horned lizard (Phrynosoma platyrhinos) standing on rock, Death Valley National Park, California, USA, Controlled conditions

Daniel Heuclin / Chihuahuan spotted whiptail lizard (Aspidocelis exsanguis) basking on rock, Chiricahua mountains, Arizona, USA, June.

Daniel Heuclin / Western Whiptail Lizard (Aspidocelis tigris tigris) male basking on rock, Panamint mountains, California, USA, May, Controlled conditions.

Daniel Heuclin / Western Whiptail Lizard (Aspidocelis tigris tigris) male basking on rock, Panamint mountains, California, USA, May, Controlled conditions.

Daniel Heuclin / Sonoran Spotted Whiptail lizard (Aspidocelis sonorae) basking on rock, Catalina state park, Arizona, USA, June

Daniel Heuclin / Chihuahuan spotted whiptail lizard (Aspidocelis exsanguis) basking on rock, Chiricahua mountains, Arizona, USA, June.

Piotr Naskrecki / Southern Rock Agama (Agama atra) juvenile, Cederberg Wilderness Area, Western Cape, South Africa

ZSSD / Grand Cayman Rock Iguana (Cyclura lewisi) pair, native to Cayman Islands

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus) on rock in shallow water, Galapagos Islands, Ecuador

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus) on rock in shallow water, Galapagos Islands, Ecuador

Alex Hyde / Fat-tailed diplodactylus / gecko (Diplodactylus conspicillatus), camouflaged on rock, New South Wales, Australia.

Bert Willaert / Bedriaga's Rock Lizard (Archaeolacerta bedriagae) basking on rock. Corsica, the Mediterranean, August.

John Abbott / Galapagos land iguana (Conolophus subcristatus) basking on rock, North Seymour Island, Galapagos

Ole Jorgen Liodden / Marine Iguana (Amblyrhynchus cristatus) on rock with dark background. Galapagos

Graham Eaton / Black Iguana (Ctenosaura similis) lying on rocks by the side of a hotel pool. Cancun, Mexico, February. Editorial Use Only.

Tony Phelps / Spotted Sand Lizard (Pedioplanis lineoocellata pulchella) basking on rock in front of desert scrub landscape. Ceres Karoo, Western Cape, South Africa, April.

Brent Stephenson / Immature Northern chuckwalla (Sauromalus ater) sunning on a rock. Isla Espiritu Santo, Baja California, Mexico, September.

Brent Stephenson / Black Iguana (Ctenosaura similis) sunning itself on a rock. Playa del Carmen, Mexico, September.

Pete Oxford / Rough scaled / Tawny Plated Lizard (Gerrhosaurus major) on rock. Kruger National Park, South Africa, December.

Pete Oxford / Black Iguana (Ctenosaura similis) sitting on a rock above a beach. Tulum Sian Ka'an Biosphere Reserve, Yucatan Peninsula, Mexico.

Danny Green / 2020VISION / Viviparous / Common lizard (Zootoca / Lacerta vivipara) basking on rock, Staffordshire, England, UK, April.

Daniel Heuclin / Yarrow's / Mountain Spiny Lizard (Sceloporus jarrovii) basking on rock. Controlled conditions. Chiricahua mountains, Arizona, USA.

Daniel Heuclin / Mountain Spiny Lizard (Sceloporus jarrovi) basking on a rock. Chiricahua mountains, Arizona, USA, September.

Daniel Heuclin / Mountain Spiny Lizard (Sceloporus jarrovi) basking on a rock. Chiricahua mountains, Arizona, USA, September.

Daniel Heuclin / Emperor Flat Lizard (Platysaurus imperator) male basking on rock. Controlled conditions. North Eastern Zimbabwe, November.

Daniel Heuclin / Emperor Flat Lizard (Platysaurus imperator) male basking on rock. Controlled conditions. North Eastern Zimbabwe, November.

Daniel Heuclin / San Lucan Rock Lizard (Petrosaurus thalassinus) basking in sun. Controlled conditions. Cape region of Baja California, Mexico, November.

Daniel Heuclin / San Lucan Rock Lizard (Petrosaurus thalassinus) basking in sun. Controlled conditions. Cape region of Baja California, Mexico, November.

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

Staffan Widstrand / Large group of Marine Iguana (Amblyrhynchus cristatus) basking on volcanic rock. Fernandina Island, Punta Espinosa, Galapagos, Ecuador, April.

Staffan Widstrand / Mimmi Widstrand and a Marine Iguana, (Amblyrhynchus cristatus) warming itself on a rock. Rabida Island, Galapagos, Ecuador. Model released

Staffan Widstrand / Marine Iguana (Amblyrhynchus cristatus) basking on volcanic rock. Fernandina Island, Punta Espinosa, Galapagos, Ecuador, April.

Staffan Widstrand / Marine Iguana (Amblyrhynchus cristatus) basks on volcanic rock high above the sea as a gull flies past. Punta Suarez, Espaniola, Galapagos, Ecuador, April.

Staffan Widstrand / Marine Iguana (Amblyrhynchus cristatus) basking on a rock as sea spray forms a rainbow. Punta Suarez, Espaniola, Galapagos, Ecuador, April.

Staffan Widstrand / Marine Iguana (Amblyrhynchus cristatus) basking on volcanic rock. Fernandina Island, Punta Espinosa, Galapagos, Ecuador, April.

Nick Upton / Starred Agama / Stellion (Laudakia stellio stellio) clinging to a rock. Lesbos / Lesvos, Greece, August.

Bruno D'Amicis / Linosa island's subspecies of the Filfola Lizard or Maltese Wall Lizard (Podarcis filfolensis ssp. laurentimulleri) on volcanic rock. Linosa, Sicily, July.

Bruno D'Amicis / Linosa island's subspecies of the Maltese Wall Lizard (Podarcis filfolensis / lilfordi ssp. laurentimulleri) on volcanic rock. Linosa, Sicily, July.

Bruno D'Amicis / Ocellated Skink (Chalcides ocellatus tiligugu/linosae) basking on rock. Dark morph/subspecies of Linosa island. Sicily, Italy, July.

Andy Rouse / Marine Iguana (Amblyrhynchus cristatus) on rock. Punta Espinoza, Galapagos, October.

Nick Upton / Male Tyrrhenian wall lizard (Podarcis tiliguerta) sun basking on a granite rock. Corsica, France, June.

Nick Upton / Male Tyrrhenian wall lizard (Podarcis tiliguerta) sun basking on a rock. Corsica, France, May.

Nick Upton / Female Tyrrhenian wall lizard (Podarcis tiliguerta) sun basking on a granite rock. Corsica, France, June.

Tui De Roy / Red-headed Rock Agama (Agama agama) male, Mpala Research Centre, Kenya

Tui De Roy / Red-headed Rock Agama (Agama agama) male displaying, Mpala Research Centre, Kenya

Konrad Wothe / Red-headed Rock Agama (Agama agama) male basking, Serengeti, Tanzania

Juan Carlos Munoz / Marine iguanas (Amblyrhynchus cristatus) on a rock by the sea. Galapagos islands, Jan 2009

Juan Carlos Munoz / Marine iguanas (Amblyrhynchus cristatus) on a rock by the sea. Galapagos islands, Jan 2009