Jiri Lochman / Brown tree snake (Boiga irregularis), Wallamans Falls, Girringun National Park, Wet Tropics of Queensland UNESCO Natural World Heritage Site, Queensland, Australia.

Chien Lee / Brown Tree Snake (Boiga irregularis) juvenile, Mamberamo Basin, Dabra, Indonesia

Chien Lee / Brown Tree Snake (Boiga irregularis), Weda Bay, Halmahera, Sulawesi, Indonesia

Chien Lee / Brown Tree Snake (Boiga irregularis), Halmahera Island, North Maluku, Indonesia

Juergen Freund / Brown tree snake (Boiga irregularis) hanging down against the leaf of a Frangipani. Queensland, Australia, February

Juergen Freund / Brown tree snake (Boiga irregularis) coiled around the leaves of a Frangipani. Queensland, Australia, February

Juergen Freund / Brown tree snake (Boiga irregularis) inspecting an ant. Queensland, Australia, February

Robert Valentic / Brown tree snake {Boiga irregularis} male in pre-strike posture, Mackay, Queensland, Australia

Miles Barton / Brown tree snake {Boiga irregularis}, example of bioinvasion and responsible for bird extinctions on US Territory of Guam, Western Pacific Ocean

Michael & Patricia Fogden / Brown Tree Snake (Boiga irregularis) sensing with tongue in the rainforest, introduced pest, Kuranda State Forest, Australia

Michael & Patricia Fogden / Brown Tree Snake (Boiga irregularis) in defensive display, sensing with tongue in the rainforest, Kuranda State Forest, Australia

Gerry Ellis / Brown Tree Snake (Boiga irregularis), native to tropical Australia but introduced to Guam where it has decimated native bird populations