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.

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

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

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

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

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

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

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

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

Tim Fitzharris / Brown Vine Snake (Oxybelis aeneus) in defensive posture, South America