Gabriel Rojo / Patagonia green racer snake (Philodryas patagoniensis) Captive occurs in South America.

Gabriel Rojo / Baron's green racer (Philodryas baroni) Argentina. Captive occurs in South America.

Paul Bertner / Green-striped Vine Snake (Philodryas argentea), Yasuni National Park, Ecuador

Gabriel Rojo / Patagonian green racer 1+Philodryas patagoniensis+2 La Pampa, Argentina

Shibai Xiao / Taiwan beautiful / Cave racer snake (Elaphe taeniura) on branch in defensive pose, Fanjingshan National Nature Reserve, Guizhou Province, China.

Pete Oxford / Green Racer (Chironius exoletus), Mindo Cloud Forest, Ecuador

Pete Oxford / Green Racer (Chironius exoletus), Mindo Cloud Forest, Ecuador

Michael D. Kern / Barons racer (Philodryas baroni) adult and juvenile, captive, from South America

Michael & Patricia Fogden / Green Racer (Drymobius melanotropis) amid leaf litter on rainforest floor, Costa Rica

Michael & Patricia Fogden / Green Racer (Chironius exoletus) close-up, cloud forest ecosystem, Costa Rica

Claus Meyer / Black Mussurana (Clelia occipitolutea) snake, eating a Hognose Snake (Philodryas nattereri), Caatinga ecosystem, Brazil

Claus Meyer / Black Mussurana (Clelia occipitolutea) snake, eating a Hognose Snake (Philodryas nattereri), Caatinga ecosystem, Brazil

Pete Oxford / Hog-nosed Snake (Leioheterodon modestus) camouflaged amid leaf litter, Ankarafantsika Special Reserve, Madagascar

Robert Valentic / Red-tailed racer (Gonyosoma oxycephalum) Phuket Island, Thailand, Controlled conditions.