Pete Oxford / Bonaire whiptail lizard (Cnemidophorus murinus ruthveni) male, Bonaire, Netherlands Antilles, Caribbean. Endemic to Bonaire and Klein Bonaire.

Rolf Nussbaumer / Texas spotted whiptail lizard, male {Cnemidophorus gularis gularis} Texas, USA.

Rod Williams / Golden Tegu (Tupinambis teguixin) head portrait. Captive. Endemic to Central South America.

Luiz Claudio Marigo / Brazilian whiptail lizard (Cnemidophorus nativo) resting on leaves in the ecosystem Campo Nativo (Native Field) Vale Natural Reserve, municipality of Linhares, Espa­rito Santo State, Eastern Brazil.

Daniel Heuclin / Western Whiptail Lizard (Aspidocelis tigris tigris) male, head portrait, Panamint mountains, California, USA, May, 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 / New Mexico whiptail lizard (Aspidocelis neomexicana) on rocky ground, Oliver Lee state park, New Mexico, USA, June

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

Pete Oxford / Bonaire whiptail lizard (Cnemidophorus murinus ruthveni) female, Bonaire, Netherlands Antilles, Caribbean, endemic to Bonaire and Klein Bonaire

Pete Oxford / Bonaire Whiptail (Cnemidophorus murinus ruthveni) female, Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Bonaire Whiptail (Cnemidophorus murinus ruthveni) male, Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Bonaire Whiptail (Cnemidophorus murinus ruthveni) male, Bonaire, Netherlands Antilles, Caribbean

Daniel Heuclin / Rainbow Whiptail Lizard (Cnemidophorus lemniscatus), a parthenogenetic species (can reproduce without fertilisation: the female can effectively clone itself). French Guyana, August.

Daniel Heuclin / Rainbow Whiptail Lizard (Cnemidophorus lemniscatus), a parthenogenetic species (can reproduce without fertilisation: the female can effectively clone itself). French Guyana, August.

Daniel Heuclin / Little white whiptail lizard (Cnemidophorus inornatus) moving through sand, White Sands National Park. New-Mexico, USA Controlled conditions.

Barry Mansell / Arizona Striped Whiptail lizard (Aspidoscelis arizonae) female on sand, Cochise Co, Arizona, USA

Barry Mansell / Caiman Lizard (Dracaena guianensis) portrait, Brazil, South America

Barry Mansell / Arizona Striped Whiptail lizard (Aspidoscelis arizonae) male with blue tail, Cochise Co, Arizona, USA

Luiz Claudio Marigo / Golden Tegu Lizard (Tupinambis teguixin) on the dry bed of a river, Cabaceiras town, interior of Paraaba State, Northeastern Brazil. December

Pete Oxford / Jungle Runner (Ameiva ameiva), Rupununi, Guyana

Michael D. Kern / Caiman lizard (Dracaena guianensis) captive, from NE South America

Luiz Claudio Marigo / Tegu Lizard (Tupinambis teguixin) feeding on fruit and waste material at the headquarters of Emas National Park, Gois State, Brazil.

Tim Martin / False Monitor Lizard / Monitor Tegu (Callopistes flavipunctatus). This sub species known as the Tumbesian Tegu. Dry Forest, Northern Peru, April

Tim Martin / False Monitor Lizard / Monitor Tegu (Callopistes flavipunctatus). This sub species known as the Tumbesian Tegu. Dry Forest, Northern Peru, April

John Cancalosi / Sonoran Spotted Whiptail lizard (Cnemidophorus sonorae) Arizona, USA. Two females mating - "All female" reproduction by parthenogenesis

GEORGETTE DOUWMA / Blue whiptial lizard (Cnemidophorus murinus). Bonaire, Netherlands Antilles, Caribbean

GEORGETTE DOUWMA / Blue whiptial lizard (Cnemidophorus murinus) Bonaire, Netherlands Antilles, Caribbean

Michael D. Kern / Columbian / Golden tegu lizard {Tupinambis teguixin} sensing the air with its tongue, captive, from Amazon Basin, especially Colombia

Philippe Clement / Sonoran spotted whiptail lizard (Cnemidophorus sonorae). Arizona, USA. Captive.

Rolf Nussbaumer / Texas Spotted Whiptail lizard {Cnemidophorus gularis} Hill Country, Texas, USA

Rolf Nussbaumer / Texas Spotted Whiptail lizard {Cnemidophorus gularis} Hill Country, Texas, USA

PREMAPHOTOS / Rainbow whiptail lizard {Cnemidophorus lemniscatus} male on rock in rainforest, Venezuela

Rod Williams / Golden tegu lizard {Tupinambis teguixin nigropunctatus} captive, from Central america

Michael D. Kern / Argentinian black and white Tegu {Tupinambis merianae} tasting with tongue, captive occurs East and Central S. America

Willem Kolvoort / Lizard {Ameiva ameiva} Central Suriname Nature Reserve, Suriname

John Cancalosi / Sonoran spotted whiptail lizard {Cnemidophorus sonorae} Arizona, USA.

Pete Oxford / Caiman lizard {Dracaena guianensis} Ecuador, South America

Willem Kolvoort / Green rainbow lizard (Cnemidophorus lemniscatus) female, Galibi, Surinam. 2003.

John Cancalosi / Spotted whiptail lizard {Cnemidophorus sp} parthenogenetic animal, captive

Luiz Claudio Marigo / Golden tegu lizard, Emas NP, Brazil {Tupinambis teguixin / nigropunctatus}

Luiz Claudio Marigo / Golden tegu lizard, Emas NP, Brazil {Tupinambis teguixin / nigropunctatus}

Pete Oxford / Tegu lizard (Tupinambis teguixin) Serra da Bodoquena, Brazil

Pete Oxford / Tegu lizard (Tupinambis teguixin) Serra da Bodoquena, Brazil

Michael Pitts / Two Whiptail lizards {Cnemidophorus sp} on cactus, Bonaire, Caribbean

Pete Oxford / Common Tegu (Tupinambis teguixin) lizard, portrait, side view, Brazil

Pete Oxford / Common Tegu (Tupinambis teguixin) lizard, in grass, Brazil

Konrad Wothe / Common Tegu (Tupinambis teguixin) pair, Trinidad, West Indies

Michael & Patricia Fogden / Hog-nosed Pit Viper (Bothrops nasutus) predating Middleamerican Ameiva (Ameiva festiva) lizard note the use of fangs to manipulate prey into snake's mouth, rainforest, Costa Rica

Michael & Patricia Fogden / Calico Snake (Oxyrhopus petola) constricting a rainforest Middleamerican Ameiva (Ameiva festiva) lizard, rainforest, Costa Rica

Claus Meyer / Racerunner Lizard (Plica sp) portrait, Amazon, Brazil

Claus Meyer / Common Tegu (Tupinambis teguixin), Caatinga, Brazil

Claus Meyer / Jungle Runner (Ameiva ameiva) savanna, Brazil

Tui De Roy / Common Tegu (Tupinambis teguixin) foraging on grassy Cerrado habitat, Emas National Park, Brazil

Tui De Roy / Common Tegu (Tupinambis teguixin) foraging on grassy Cerrado habitat, Emas National Park, Brazil

Phil Savoie / Desert grassland whiptail lizard (Aspidoscelis uniparens) female with eggs, USA.

John Cancalosi / Spotted whiptail lizard {Cnemidophorus sp} parthenogenetic animal, captive

PREMAPHOTOS / Male Whiptail lizard {Cnemidophorus lemniscatus} Venezuela, South America

PREMAPHOTOS / Male Whiptail lizard {Cnemidophorus lemniscatus} Venezuela, South America

Pete Oxford / Bonaire Whiptail (Cnemidophorus murinus ruthveni) male basking, Bonaire, Netherlands Antilles, Caribbean

Tui De Roy / Common Tegu (Tupinambis teguixin) foraging on grassy Cerrado habitat, Emas National Park, Brazil

Tui De Roy / Common Tegu (Tupinambis teguixin) foraging on grassy Cerrado habitat, Emas National Park, Brazil

Tui De Roy / Common Tegu (Tupinambis teguixin) foraging on grassy Cerrado habitat, Emas National Park, Brazil