Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female among canopy leaves. Udzungwa Mountains National Park headquarters near Mang'ula, Tanzania. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female among canopy leaves. Udzungwa Mountains National Park headquarters near Mang'ula, Tanzania. Endangered species

Karine Aigner / Graduate student and biological technician holding a Argentine black and white tegu (Salvator merianae) that has been trapped and brought back to headquarters to be euthanized. This invasive species i...

Ashley Cooper / The Headquarters of the Australian Rainforest Foundation in the Daintree rainforest. The foundation is growing saplings to help the rainforest recover from felling. Queensland, Australia, February 201...

Ashley Cooper / The Headquarters of the Australian Rainforest Foundation in the Daintree rainforest. The foundation is growing saplings to help the rainforest recover from felling. Queensland, Australia, February 201...

Ashley Cooper / Banking and financial sector buildings at Canary Wharf, London, England, UK, December 2008.

Ashley Cooper / The Governor's house and parliament building in Port Stanley, Falkland Islands. February 2014.

Igor Shpilenok / Mist over Yailyu Village on Teletskoye Lake. Headquarters of Altai Nature Reserve. Golden Mountains of Altai UNESCO World Heritage Site. Russia. July 2013.

Igor Shpilenok / Yaksha village, headquarters of Pechora-Ilichsky Nature Reserve, Virgin Forests of Komi UNESCO World Heritage Site, Russia's Ural Mountains. August 2016.

Gerrit Vyn / Cornell Lab of Ornithology headquarters, Sapsucker Woods, New York, USA, September 2012.

Lisa Hoffner / Elephant radio collars at Save the Elephants research headquarters, Samburu National Reserve, Kenya.

Pete Oxford / Guard carrying confiscated poached elephant tusk. Mbomo African Park's Congo Headquarters. Odzala-Kokoua National Park, Republic of Congo (Congo-Brazzaville), Africa, May 2013.