Robert Valentic / Phuket horned tree lizard (Acanthosaura phuketensis) near Bang Pae Waterfall, Khao Phra Thaew NP, Phuket Island, Thailand.

Chien Lee / Common Flat-tail Gecko (Uroplatus fimbriatus) on tree, Marojejy National Park, Madagascar

Juergen Freund / Green Tree Ants (Oecophylla smaragdina) attacking Common House Gecko (Hemidactylus frenatus) Cairns, Queensland, Australia

Shibai Xiao / Colour changed tree monitors / Garden lizard (Calotes versicolor) and Bronze skinks (Lygosoma indicum) hanging up at market ready to sell as pets, Hainan Island, China, January 2007. No release availa...

Shibai Xiao / Tokay gecko (Gekko gecko) jumping to a higher tree, Guangxi Province, China.

Rod Williams / Green / Emerald Tree Monitor (Varanus prasinus) head portrait climbing tree trunk. Captive, from Papua New Guinea, Indonesia

Wild Wonders of Europe / Ziegler / African chameleon (Chamaeleo africanus) in tree, in a captive wintering program, The Peloponnese, Greece, May 2009

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

Juergen Freund / Boyds Forest Dragon climbing tree {Hypsilurus boydii} Mossman Gorge, Queensland, Australia

Georgette Douwma / Asian water monitor lizard (Varanus salvator) climbing tree, Kinabatangan flood plain, Sabah, Malaysia

Pete Oxford / Leaf tailed gecko camouflaged on tree trunk {Uroplatus sikorae} Madagascar

Pete Oxford / Parson's chameleon(Chamaeleo parsonii) feeding on locust. La Madraka, Madagascar