Christophe Courteau / Cape Dwarf Chameleon (Bradypodion pumilum) in tree at night, Botswana

Kerstin Hinze / Blue headed tree agama (Acanthocercus atricollis), Zulufalls, Hidden Valley, KwaZulu-Natal, South Africa

Hiroya Minakuchi / Tree Dragon (Gonocephalus sp) juvenile, Malaysia

Daniel Heuclin / Saltflat Lizard (Liolaemus fabiani). Atacama, Chile.

Konrad Wothe / Common iguana (Iguana iguana) in lowland rainforest in tree, Braulio Carrillo National Park, Costa Rica

Shibai Xiao / Pingxiang cave gecko (Goniurosaurus luii) clinging to tree trunk with strong red eyes, Guangxi Province, China.

Shibai Xiao / Tokay gecko (Gekko gecko) clinging to the truck of tree in a upside down position, Guangxi Province, China.

Shibai Xiao / Fine lizard (Acanthosaura lepidogaster) resting in tree, Bawangling National Nature Reserve, Hainan Island, China.

Shibai Xiao / Bawangling cave gecko (Goniurosaurus bawanglingensis) male standing on fallen banana tree leaf, Bawangling National Nature Reserve, Hainan Island, China.

Dave Watts / Boyd's forest dragon (Gonocephalus / Hypsilurus boydii) on tree trunk, The Wet Tropics World Heritage Area rainforest, North Queensland, Australia, November

Dave Watts / Boyd's forest dragon (Gonocephalus / Hypsilurus boydii) on tree trunk, The Wet Tropics World Heritage Area rainforest, North Queensland, Australia, November

Daniel Heuclin / Western Zebra tailed Lizard (Callisaurus draconoides rhodostictus) controlled conditions, Joshua's Tree National Monument, California, USA

Daniel Heuclin / Great basin collared lizard (Crotaphytus bicinctores) male, taken in controlled conditions, Joshua's Tree National Monument, California, USA

Daniel Heuclin / Northern Chuckwalla (Sauromalus obesus) male eating egg, controlled conditions, Joshua's Tree National Monument, California, USA

Daniel Heuclin / Northern Chuckwalla (Sauromalus obesus) male head portrait, Joshua's Tree National Monument, California, USA

Daniel Heuclin / Northern Chuckwalla (Sauromalus obesus) male 'pumping', Joshua's Tree National Monument, California, USA

Loic Poidevin / Madagascar spiny-tailed iguana (Oplurus cuvieri) climbing up tree, Madagascar.

Martin Willis / Banded Tree Monitor (Varanus scalaris) juvenille, Atherton Tableland, Queensland, Australia

Alex Mustard / Green / common iguana (Iguana iguana) climbing a tree, Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies.

Pete Oxford / Broad-headed skink (Eumeces laticeps) male on tree trunk, The Orianne Indigo Snake Preserve, Telfair County, Georgia, USA

Suzi Eszterhas / Borneo Anglehead Lizard (Gonocephalus bornensis), Danum Valley Conservation Area, Malaysia

John Cancalosi / Green / Common Iguana (Iguana iguana) climbing down tree. Costa Rican tropical rainforest.

John Cancalosi / Green / Common Iguana (Iguana iguana) climbing tree. Costa Rican tropical rainforest.

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

Patricio Robles Gil / Green Iguana (Iguana iguana) on tree. Parana, Southern Brazil.

Kevin Schafer / Boyd's Forest Dragon (Gonocephalus / Hypsilurus boydii) on tree trunk, Curtain Fig National park, Atherton Tablelands, Queensland, Australia, December

Daniel Heuclin / Emerald tree monitor (Varanus prasinus) resting on branch in tree, captive, from New-Guinea

Daniel Heuclin / Emerald tree monitor (Varanus prasinus) portrait, captive, from New-Guinea

Christian Ziegler / Borneo Anglehead Lizard (Gonocephalus bornensis) in defensive posture, Lambir Hills National Park, Sarawak, Malaysia

Christian Ziegler / Borneo Anglehead Lizard (Gonocephalus bornensis), Lambir Hills National Park, Sarawak, Malaysia

Brent Stephenson / Madagascar Day Gecko (Phelsuma madagascariensis) on the side of a tree trunk. Ampijaroa, Ankarafantsika National Park, Madagascar.

Brent Stephenson / Plated Leaf / Ground Dwelling Chameleon (Brookesia stumpffi) well camouflaged on a tree branch. Montagne d'Ambre National Park, Diego Suarez, Madagascar.

Brent Stephenson / Oustalet's Chameleon (Furcifer oustaleti) at night on a tree branch. Ampijaroa, Ankarafantsika National Park, Madagascar.

Pete Oxford / Black Iguana (Ctenosaura similis) climbing a tree. Sian Ka'an Biosphere Reserve, Yucatan Peninsula, Mexico.

Pete Oxford / Black Iguana (Ctenosaura similis) climbing a tree. Sian Ka'an Biosphere Reserve, Yucatan Peninsula, Mexico.

Pete Oxford / Black Iguana (Ctenosaura similis) climbing a tree. Sian Ka'an Biosphere Reserve, Yucatan Peninsula, Mexico.

Ross Hoddinott / Common / viviparous lizard (Lacerta vivipara) crawling over tree bark. North Cornwall, UK, July

Inaki Relanzon / Leaf tale gecko (Uroplatus sikorae) leaping from tree trunk, Ranomafana National Park, East Madagascar.

Rod Williams / Green / Emerald tree monitor (Varanus prasinus) captive, from Papua New Guinea, Indonesia

Chien Lee / Bornean Crested Lizard (Gonocephalus grandis) male, Gunung Mulu National Park, Sarawak, Borneo, Malaysia

Chien Lee / Bornean Crested Lizard (Gonocephalus grandis) male, Gunung Mulu National Park, Sarawak, Borneo, Malaysia

Chien Lee / Doria's Anglehead Lizard (Gonocephalus doriae), Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Chien Lee / Borneo Anglehead Lizard (Gonocephalus bornensis), Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Chien Lee / Borneo Anglehead Lizard (Gonocephalus bornensis), Gunung Mulu National Park, Sarawak, Borneo, Malaysia

Chien Lee / Bornean Crested Lizard (Gonocephalus grandis) female, Gunung Gading National Park, Malaysia

Chien Lee / Borneo Anglehead Lizard (Gonocephalus bornensis), Kubah National Park, Malaysia

Chien Lee / Dusky Gliding Lizard (Draco obscurus) camouflaged on tree trunk, Fairy Cave, Bau, Malaysia

Pete Oxford / Collared tree runner (Tropidurus plica) in rainforest, Iwokrama reserve, Guyana

Pete Oxford / Collared tree runner (Tropidurus plica) in rainforest, Iwokrama reserve, Guyana

Bernard Castelein / Tree Gecko (Hemidactylus platycephalus) camouflaged on tree trunk, Jozani Chwaka Bay NP, Zanzibar, Tanzania

Thomas Marent / Bornean Crested Lizard (Gonocephalus grandis) young, Forest Research Institute Malaysia, Malaysia

Edwin Giesbers / Flying Dragon / Lizard (Draco volans) with throat pouch extended, standing on tree branch, Sarawak, Borneo, Malaysia

Edwin Giesbers / Green Crested Lizard (Bronchocela cristatella) climbing down tree trunk, Sarawak, Borneo, Malaysia

James Christensen / Equatorial Anole (Anolis aequatorialis) on mossy tree trunk, Mindo, Ecuador

James Christensen / Equatorial Anole (Anolis aequatorialis) on mossy tree trunk, Mindo, Ecuador

Alex Hyde / Leaf-tailed gecko {Uroplatus sikorae} camouflaged against mossy tree trunk in rainforest. Masoala Peninsula National Park, north east Madagascar.

Alex Hyde / Leaf-tailed gecko {Uroplatus sikorae} camouflaged on tree trunk in rainforest, Andasibe-Mantadia National Park, Eastern Madagascar.

Alex Hyde / Grandidier's velvet gecko {Blaesodactylus sakalava} on tree trunk at night, Madagascar

Alex Hyde / Grandidier's velvet gecko {Blaesodactylus sakalava} on tree trunk at night, Madagascar

Alex Hyde / Leaf-tailed gecko {Uroplatus sikorae} on mossy tree trunk in rainforest. Masoala Peninsula National Park, north east Madagascar.

Alex Hyde / Leaf-tailed gecko {Uroplatus sikorae} camouflaged on mossy tree trunk in rainforest. Masoala Peninsula National Park, north east Madagascar.

Rod Williams / Green / Emerald Tree Monitor (Varanus prasinus) head portrait climbing tree trunk, captive.

Pete Oxford / Galapagos Leaf-toed Gecko (Phyllodactylus galapagensis) climbing tree, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Leaf-toed Gecko (Phyllodactylus galapagensis) camouflaged on tree bark, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Sergey Gorshkov / Leopard (Panthera pardus) in tree near a Monitor Lizard (Varanus sp), Botswana

Mary McDonald / Dark Chanting Goshawk (Melierax metabates) perched on tree branch, feeding on an Agama lizard. Ndutu, Serengeti NP, Tanzania, East Africa.

Tim Laman / Flying dragon lizard (Draco sp) male on tree trunk in the rainforest, Tangkoko National Park, Sulawesi, Borneo, Indonesia

Tim Laman / Flying dragon lizard (Draco sp) male on tree trunk in rainforest Danum Valley Conservation Area, Sabah, Borneo, Malaysia.

Tim Laman / Flying dragon lizard (Draco sp) camouflaged on tree trunk in rainforest, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia

Tim Laman / Flying dragon lizard (Draco sp) camouflaged on tree trunk in rainforest, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia

Tim Laman / Kuhl's flying gecko (Ptychozoon kuhlii) camouflaged on tree trunk in lowland rainforest, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia

Tim Laman / Kuhl's flying gecko (Ptychozoon kuhlii) camouflaged on tree trunk in lowland rainforest, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia

Tim Laman / Flying dragon lizard (Draco sp) female on a tree trunk in the rainforest, Danum Valley Conservation Area, Sabah, Borneo, Malaysia.

Tim Laman / Kuhl's Flying Gecko (Ptychozoon kuhlii) gliding towards a small tree in the lowland rainforest, Bako National Park, Sarawak, Borneo, Malaysia

Tim Laman / Kuhl's Flying Gecko (Ptychozoon kuhlii) gliding towards a small tree in the lowland rainforest, Bako National Park, Sarawak, Borneo, Malaysia

Tim Laman / Flying dragon lizard (Draco sp) landing on tree trunk gliding, Danum Valley Conservation Area, Sabah, Borneo, Malaysia.

Tim Laman / Kuhl's flying gecko (Ptychozoon kuhlii) camouflaged on tree trunk, Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Tim Laman / Kuhl's flying gecko (Ptychozoon kuhlii) gliding to small tree in the lowland rainforest, Danum Valley Conservation Area, Sabah, Borneo, Malaysia, Double exposure of the same lizard on the frame by...

Tim Laman / Flying dragon lizard (Draco sp) male on tree trunk in rainforest, Danum Valley Conservation Area, Sabah, Borneo, Malaysia.

Tim Laman / Flying dragon lizard (Draco sp) camouflaged against moss on tree trunk in the rainforest, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia.

James Christensen / Giant Green Anole (Anolis frenatus) female on tree trunk, central Panama

James Christensen / Giant Anole (Dactyloa microtus) male on a tree trunk, Boquete, Panama

James Christensen / Giant Anole (Dactyloa microtus) male on a tree trunk, Boquete, Panama

James Christensen / Equatorial Anole (Anolis aequatorialis) young male perched on mossy tree limb, Mindo, Ecuador

James Christensen / Equatorial Anole (Anolis aequatorialis) large male perched on mossy tree trunk, Mindo, Ecuador

James Christensen / Equatorial Anole (Anolis aequatorialis) on mossy tree limb, Mindo, Ecuador

Alan Watson / Leaf-tailed gecko (Uroplatus fantasticus) climbing tree trunk and missing its tail, in rainforest at 1,200 metres, Ranomafana National Park, Madagascar

Alan Watson / Female O'Shaughnessy's chameleon (Calumma oshaughnessyi) on tree branch at 1,200 metres, Ranomafana National Park, Madagascar

Alan Watson / Stump-tailed / Dwarf chameleon (Brookesia therezieni) on tree branch, Ranomafana National Park, Madagascar

Alan Watson / Leaf-tailed gecko (Uroplatus sikorae) camouflaged against tree trunk, Andasibe-Mantadia National Park, Madagascar

Tim Laman / Head portrait of Bornean angle-headed lizard (Gonocephalus bornensis) on a tree trunk in lowland rainforest (endemic to Borneo) Danum Valley Conservation Area, Sabah, Malaysia.

Tim Laman / Bornean angle-headed lizard (Gonocephalus bornensis) on a tree trunk in lowland rainforest (endemic to Borneo) Danum Valley Conservation Area, Sabah, Malaysia.

Tim Laman / Portrait of male Giant angle-headed lizard (Gonocephalus grandis) low on a tree trunk in the lowland rain forest of Borneo.

Alan Watson / Male bark anole lizard (Anolis distichus) displaying bright orange dewlap to another lizard on the trunk of an almacigo tree (Bursera simaruba) in tropical rainforest, Los Haitises National Park, Domi...

Alan Watson / Bark anole lizard (Anolis distichus) on the stilt roots of a yagrumo tree (Cecropia schreberiana) in lowland tropical rainforest over limestone, Los Haitises National Park, Dominican Republic, Caribbe...

Alan Watson / Anole lizard (Anolis sp.) on a tree in lowland tropical rainforest at 430 metres, Loma Quita Espuela Scientific Reserve, Dominican Republic.