Bert Willaert / Hognosed Pit Viper (Porthidium nasutum) coiled. Ecuador, South America.

Melvin Grey / Hog-nosed pit viper (Porthidium nasutum) Atlantic Lowland Rainforest, Costa Rica.

Paul Hobson / Hognosed pitviper (Porthidium nasutum). Costa Rica.

Chien Lee / Rainforest Hognose Viper (Porthidium nasutum), Esmeraldas, Ecuador

Michael D. Kern / Hognosed Pit Viper (Porthidium nasutum) captive, from Central and South America and Caribbean

Bert Willaert / Hognosed Pit Viper (Porthidium nasutum) coiled. Ecuador, South America.

Murray Cooper / Rainforest Hognose Viper (Porthidium nasutum) coiled on tree trunk, Ecuador

Claudio Contreras / Rainforest hognose pitviper (Porthidium nasutum) Montes Azules Biosphere Reserve, Lacandon Rainforest, Mexico, September

Claudio Contreras / Rainforest hognose pitviper (Porthidium nasutum) Montes Azules Biosphere Reserve, Lacandon Rainforest, Mexico, September

Nick Garbutt / Hog-nosed pit viper (Porthidium nasutum) camouflaged in leaf litter on the rainforest floor, Boca Tapada region, Costa Rica.

Daniel Nunez / Hognose viper (Porthidium nasutum) resting in leaf litter, Sierra Caral, Izabal, Guatemala.

Daniel Nunez / Hognose viper (Porthidium nasutum) juvenile, resting on dried leaf, Sierra Caral, Izabal, Guatemala.