Tim Fitzharris / Palm trees, Asan Beach, War in the Pacific National Historic Park, Guam

Tim Fitzharris / Palm trees on Ritidian Beach, Guam

Tim Fitzharris / Palm trees, Agana Beach, Guam

Tim Fitzharris / Palm trees, Agana Beach, Guam

Michael Hutchinson / Micronesian Kingfisher (Todiramphus cinnamominus) Extinct in the wild (originally from Guam, Palau Islands, Micronesia), captive, Smithsonian National Zoo, Washington DC, USA

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

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

Gerry Ellis / Brown Tree Snake (Boiga irregularis) species has been introduced to Guam and has become a pest, Northern Territory, Australia

Miles Barton / Brown tree snake {Boiga irregularis} introduced to Guam, caused Bird extinctions

Dan Rees / Guam rail {Galirallus owstoni} held by researcher, Endangered species, Guam, Pacific ocean island

Miles Barton / Brown tree snake climbing {Boiga irregularis} Guam. Pacific Ocean - responsible for bird extinctions

Miles Barton / Brown tree snake {Boiga irregularis} responsible for bird extinction on Guam