Pete Oxford / Blunt headed treesnake with frog (Imantodes cenchoa) Ecuador Amazon rainforest, South America

Tim MacMillan / John Downer Pr / Multiple exposure of flying Paradise tree snake showing how it forms a loop for maximum thrust as it lauches itself into air (Resolution restriction - image digitised from film, 'Weird Nature' tv seri...

Claudio Contreras / Blunt-headed treesnake (Imantodes cenchoa), Catemaco Lake, Los Tuxtlas Biosphere Reserve, Mexico, July

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) at La Selva Biological Station, Costa Rica. Controlled conditions.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) juvenile tastes the air at La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) hangs from a branch and tastes the air. La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving from branch to branch. La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.

Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.

Konrad Wothe / Snake (Imantodes cenchoas) moving over branches, Panguana Reserve, Huanuco province, Amazon basin, Peru.

Konrad Wothe / Blunt headed tree snake (Imantodes cenchoas) in rainforest, Panguana Reserve, Huanuco province, Amazon basin, Peru.

MYN / Gil Wizen / Blunt-headed tree snake (Imantodes cenchoa), Caves Branch, Cayo District, Belize, September. meetyourneighbours.net project

Pete Oxford / Blunthead tree snake (Imantodes cenchoa) Yasuni National Park, Amazon Rainforest, Ecuador, South America.

Pete Oxford / Blunthead tree snake (Imantodes cenchoa) juvenile hanging off branch, Yasuni National Park, Amazon Rainforest, Ecuador, South America.

Pete Oxford / Common blunthead tree snake (Imantodes cenchoa) Mindo Cloud Forest, Western slopes, Andes, Ecuador.

MYN / Andrew Snyder / Blunt-headed tree snake (Imantodes cenchoa), Berbice River, Guyana, September. Meetyourneighbours.net project.

Chien Lee / Brown Tree Snake (Boiga irregularis) juvenile, Mamberamo Basin, Dabra, Indonesia

Chien Lee / Brown Tree Snake (Boiga irregularis), Weda Bay, Halmahera, Sulawesi, Indonesia

Pete Oxford / Blunt-headed Tree Snake (Imantodes cenchoa), Yasuni National Park, Amazon, Ecuador

John Cancalosi / Blunthead tree snake (Imantodes cenchoa) Costa Rica, July

Chien Lee / Brown Tree Snake (Boiga irregularis), Halmahera Island, North Maluku, Indonesia

John Cancalosi / Blunthead Tree Snake (Imantodes cenchoa) coiled around vegetation. Costa Rican tropical rainforest.

Konrad Wothe / Common Treesnake (Dendrelaphis punctulatus) in water, Daintree National Park, Queensland, Australia, October

Daniel Heuclin / Bluntheaded tree snake (Imantodes cenchoa) head portrait with body coiled around tree branch, Montagne de Kaw, French Guiana, Controlled conditions

Daniel Heuclin / Bluntheaded treesnake (Imantodes cenchoa) moving through forest, Montagne de Kaw, French Guiana, Controlled conditions

Daniel Heuclin / Bluntheaded treesnake (Imantodes cenchoa) head portrait, Montagne de Kaw, French Guiana, Controlled conditions

Daniel Heuclin / Bluntheaded tree snake (Imantodes cenchoa) head portrait with forked tongue protruding. Montagne de Kaw, French Guiana, Controlled conditions

Claudio Contreras / Blunt headed treesnake (Imantodes cenchoa) moving over leaf, Montes Azules Biosphere Reserve, Lacandon Rainforest, Mexico, August

James Christensen / Blunt-headed Tree Snake (Imantodes cenchoa), Colon, Panama

Juergen Freund / Brown vine Treesnake {Oxybelis aeneus} appearing through hole in a leaf, Gorgona Island, Colombia

Doug Wechsler / Blunt headed treesnake (Imantodes cenchoa) Ecuador, South America

Tom Vezo / Blunt headed tree snake {Imantodes cenchoa} Tortugero NP, Costa Rica

Michael & Patricia Fogden / Brown Tree Snake (Boiga irregularis) sensing with tongue in the rainforest, introduced pest, Kuranda State Forest, Australia

Michael & Patricia Fogden / Brown Tree Snake (Boiga irregularis) in defensive display, sensing with tongue in the rainforest, Kuranda State Forest, Australia

Michael & Patricia Fogden / Blunt-headed Tree Snake (Imantodes cenchoa) killing Beta Anole (Norops sp) the spider just happened to be passing by, Amazonian ecosystem, rainforest, Ecuador

Michael & Patricia Fogden / Blunt-headed Tree Snake (Imantodes cenchoa) on Heliconia (Heliconia stricta), Amazonian ecosystem, rainforest, Ecuador

Gerry Ellis / Brown Tree Snake (Boiga irregularis), native to tropical Australia but introduced to Guam where it has decimated native bird populations

Gerry Ellis / Brown Tree Snake (Boiga irregularis) species has been introduced to Guam and has become a pest, Northern Territory, Australia

Doug Wechsler / Blunt headed tree snake {Imantodes cenchoa} Rio San Carlos, Costa Rica

Ch'ien Lee / Blunt-headed Tree Snake (Imantodes cenchoa), Yasuni National Park, Ecuador

James Christensen / Blunt-headed Tree Snake (Imantodes cenchoa), Mindo, western slope of Andes, Ecuador

Roman Willi / Blunthead tree snake (Imantodes cenchoa) hunting at night, Osa Peninsula, Costa Rica.

Daniel Nunez / Neotropical blunt-headed treesnake (Imantodes cenchoa) hanging from palm frond at night, Caribbean Slope of Guatemala, Cerro San Gil Reserve, Izabal, Guatemala.