Claus Meyer / Two-striped Forest Pit Viper (Bothrops bilineatus) coiled around plant, front view, Atlantic Forest ecosystem, Brazil

Claus Meyer / Two-striped Forest Pit Viper (Bothrops bilineatus) hanging on a Heliconia (Heliconia sp) flower, Atlantic Forest, Brazil

Lucas Bustamante / Green jararaca / Two striped forest pit viper (Bothriopsis bilineata) on branch, Tambopata, Madre de Dios, Peru.

Lucas Bustamante / Two striped forest pitviper (Bothriopsis bilineata) curled up on log, Yasuni National Park, Orellana, Ecuador.

Pete Oxford / Two-striped forest pitviper (Bothriopsis bilineata smaragdina) Amazon, Ecuador. Captive, occurs in the Amazon.

Pete Oxford / Two-striped forest pitviper (Bothriopsis bilineata smaragdina) Amazon, Ecuador. Captive, occurs in the Amazon.

MYN / Andrew Snyder / Bi-striped viper (Bothriopsis bilineata) Chenapau, Guyana. Meetyourneighbours.net project.

MYN / Andrew Snyder / Bi-striped viper (Bothriopsis bilineata) Chenapau, Guyana. Meetyourneighbours.net project.

Michael & Patricia Fogden / Two-striped Forest Pit Viper (Bothrops bilineatus) coiled on rainforest floor using tip of tail as lure, an example of caudal luring, Amazon, Peru

Claus Meyer / Two-striped Forest Pit Viper (Bothrops bilineatus) coiled around plant, Atlantic Forest ecosystem, Brazil

Claus Meyer / Two-striped Forest Pit Viper (Bothrops bilineatus) coiled around grasses, Atlantic Forest ecosystem, Brazil

Lucas Bustamante / Two-striped forest-pitviper (Bothrops bilineatus) resting on leaf at night, Yasuni National Park, Orellana, Ecuador.