Morley Read / Parrot snake (Leptophis ahaetulla) threat display, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Dong Lei / Asian vine snake (Ahaetulla prasina) in tree. Gaoligong Mountain National Nature Reserve, Yunnan Province, China.

Dong Lei / Asian vine snake (Ahaetulla prasina) in tree. Gaoligong Mountain National Nature Reserve, Yunnan Province, China.

Duncan Murrell / Green vine snake (Ahaetulla nasuta), Sinharaja Forest Reserve, Unesco Biosphere Reserve and World Heritage Site, Sri Lanka. The green vine snake changes from pure green to chequered markings when it f...

Robert Valentic / Speckle-headed whipsnake (Ahaetulla fasciolata) sub adult from riparian lowland rainforest on Phuket Island, Thailand.

Paul Hobson / Parrot snake (Leptophis ahaetulla) head, looking at camera. Costa Rica.

Daniel Heuclin / Striped bronzeback snake (Dendrelaphis caudolineatus) on branch. Native to South East Asia. Belitung, Sumatra, Indonesia. Contolled conditions.

Daniel Heuclin / Striped bronzeback snake (Dendrelaphis caudolineatus) in tree. Native to South East Asia. Belitung, Sumatra, Indonesia. Contolled conditions.

Lucas Bustamante / Chocoan parrot snake (Leptophis bocourti) on heliconia flower with fly in background, Sarapiqui, Heredia, Costa Rica.

Paul Bertner / Oriental Whip Snake (Ahaetulla prasina) flicking tongue, Cuc Phuong National Park, Vietnam

Paul Bertner / Oriental Whip Snake (Ahaetulla prasina), Mount Isarog National Park, Philippines

Alex Hyde / Striped bronzeback (Dendrelaphis caudolineatus) juvenile. Danum Valley, Sabah, Borneo.