Morley Read / Parrot snake (Leptophis ahaetulla) threat display, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Nick Garbutt / Sumatran pit viper (Trimeresurus sumatranus) juvenile on tree trunk, in tropical rainforest. Danum Valley, Sabah, Borneo, Malaysia.

Franco Banfi / Close view of a Green anaconda, (Eunectes murinus) underwater, Formoso River, Bonito, Mato Grosso do Sul, Brazil

Ingo Arndt / Silkmoth caterpillar with eye spots to mimic snake {Oxytenis modestia} Guanacaste, Costa Rica, Central America

Luciano Candisani / Green Anaconda (Eunectes murinus) female constricting male after copulation, after which she will consume him, Brazil

Bence Mate / Satiny Parrot snake (Leptophis depressirostris) Santa Rita, Costa Rica.

Chien Lee / Oriental Whip Snake (Ahaetulla prasina) juvenile, Danum Valley Field Center, Sabah, Borneo, Malaysia

Clay Bolt / Rough Green Snake (Opheodrys aestivus) in undergrowth, Southern Appalachians, South Carolina, USA, North America, June.

Franco Banfi / Green anaconda (Eunectes murinus) underwater, flicking tongue, Formoso River, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Green anaconda (Eunectes murinus) swimming inFormoso River, Bonito, Mato Grosso do Sul, Brazil

Michael D. Kern / Sri Lankan Bamboo Pitviper (Trimeresurus trigonocephalus) captive, from Sri Lanka

Michael D. Kern / Bamboo pitviper, (Viridovipera stejnegeri) captive from Asia