Claudio Contreras / Mexican / Brown Vine Snake (Oxybelis aeneus) with mouth open. Maria Madre Island, Islas Marias Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, June.

Inaki Relanzon / Leaf nosed twig snake (Langaha madagascariensis) male, Baie de Baly National Park, North west Madagascar.

John Cancalosi / Brown Vine Snake (Oxybelis aeneus) in defensive display, mildly venomous, Costa Rica

Alex Hyde / Comparison of male (top) and female (bottom) Spear-nosed snake {Langaha madagascariensis} from the rainforest regions of eastern Madagascar. composite image.

Pete Oxford / Brown Vine Snake (Oxybelis aeneus) on road in defensive posture, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Brown Vine Snake (Oxybelis aeneus) raising head, Iwokrama Rainforest Reserve, Guyana

Inaki Relanzon / Leaf nosed twig snake (Langaha madagascariensis) male, Baie de Baly National Park, North west Madagascar.

Inaki Relanzon / Leaf nosed twig snake (Langaha madagascariensis) male, Baie de Baly National Park, North west Madagascar.

Inaki Relanzon / Leaf nosed twig snake (Langaha madagascariensis) male head, Baie de Baly National Park, North west Madagascar.

Nick Garbutt / Spear / Leaf-nosed twig snakes (Langaha madagascariensis) from the rainforest regions of eastern Madagascar. Male (top) and female (bottom) digitally altered image

Nick Garbutt / Spear-nosed Snake (Langaha madagascariensis) from the rainforest regions of eastern Madagascar. Male (top) and female (bottom) Digitally altered image.

James Christensen / Brown Vine Snake (Oxybelis aeneus) threat display, Panama

James Christensen / Brown Vine Snake (Oxybelis aeneus) threat display, Panama

Nick Garbutt / Two female Leaf nosed twig snakes {Langaha madagascariensis} Mantadia NP, East Madagascar

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

Michael D. Kern / Madagascar Leaf nosed snake {Langaha nasuta madagascariensis} Madagascar

Michael & Patricia Fogden / Brown Vine Snake (Oxybelis aeneus) arboreal snake with mouth open in defensive behavior, Costa Rica

Nick Garbutt / Leaf nosed twig snake {Langaha madagascariensis} female, Mantadia NP, Madagascar

Pete Oxford / Leaf nosed twig snake {Langaha madagascariensis} male, Madagascar

John Cancalosi / Brown vine snake, defensive display {Oxybelis aeneus} Costa Rica

Nick Garbutt / Leaf nosed twig snake {Langaha madagascariensis} rainforest, Madagascar

Nick Garbutt / Leaf nosed twig snake male {Langaha madagascariensis} Mantadia NP, East Madagascar

PREMAPHOTOS / Brown vine snake {Oxybelis aeneus} tropical dry forest, Costa Rica, Central America