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

Jabruson / Armed Eco-Guard at National Park Headquarters at Camp Ma'an National Park, Southern Cameroon.

Jabruson / Slash and burn agricultural activity outside the town of Bayanga, ironically where headquarters for Dzanga-Ndoki National Park is located, Southern Central African Republic, March 2012. Forest cleara...

Mark Carwardine / Anti-poaching patrol training at park headquarters, Alaungdaw Kathapa National Park, north-western Burma (Myanmar)

Mark Carwardine / Anti-poaching patrol training at park headquarters, Alaungdaw Kathapa National Park, north-western Burma (Myanmar)

Roland Seitre / Ranger of the Ishaqbini Reserve Northern Rangelands Trust at the headquarters, speaking on the radio. Kenya.

Roland Seitre / Children with macaw models at the Headquarters of the Programme for the Conservation of the Blue throated / Wagler's macaw (Ara glaucogularis) Trinidad, Beni, Bolivia, Critically endangered species, J...

Roland Seitre / Conservation officer wearing a Macaw headress at headquarters of the Programme for the Conservation of the Blue throated / Wagler's macaw (Ara glaucogularis) Trinidad, Beni, Bolivia, Critically endang...

Roland Seitre / Conservation officers and children reading educational leaflets at the headquarters of the Programme for the Conservation of the Blue throated / Wagler's macaw (Ara glaucogularis) Trinidad, Beni, Boli...

Roland Seitre / Headquarters of the Programme for the Conservation of the Blue throated / Wagler's macaw (Ara glaucogularis) Trinidad, Beni, Bolivia, Critically endangered species, January 2008.

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) adult female (top) with two juveniles, feeding on leaves. Udzungwa Mts National Park, Tanzania headquarters near Mang'ula. Endangered species

Tom Struhsaker / Udzungwa Red Colobus Monkey (Procolobus gordonorum) sub-adult male feeding. 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

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

Tom Struhsaker / Udzungwa red colobus (Procolobus gordonorum) adult female, Udzungwa Mts NP headquarters near Mang'ula, Tanzania. Endangered

Luiz Claudio Marigo / Tegu Lizard (Tupinambis teguixin) feeding on fruit and waste material at the headquarters of Emas National Park, Gois State, Brazil.

Suzi Eszterhas / Belinda Low (Executive Director) and Peter Lalampaa (Field Program Coordinator) of Grevy's Zebra Trust at Kalama Conservancy Headquarters Kalama Conservancy, Northern Rangelands Trust, Kenya, January...

Yva Momatiuk & John Eastcott / American Elk (Cervus elaphus nelsoni) females and calves resting near park headquarters with tourists, Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / American Elk (Cervus elaphus nelsoni) females and calves resting near park headquarters with tourists, Yellowstone National Park, Wyoming

Yva Momatiuk & John Eastcott / American Elk (Cervus elaphus nelsoni) females and calves resting near park headquarters, Yellowstone National Park, Wyoming

Suzi Eszterhas / Water storage tank at the Headquarters of the West Gate Conservancy, Northern Rangelands Trust, Kenya

Suzi Eszterhas / Park ranger in her office at Headquarters of the West Gate Conservancy, Northern Rangelands Trust, Kenya *No model release available - for editorial use only

Suzi Eszterhas / Headquarters of the West Gate Conservancy, Northern Rangelands Trust, Kenya

Luiz Claudio Marigo / Aerial view of Anavilhanas Ecological Station and its headquarters in floating houses on "igapó" flooded Amazon Rainforest, in Negro River, north of Manaus city, Amazonas State, Northern Brazil.

Luiz Claudio Marigo / Aerial view of headquarters of Guaporé Biological Reserve, Western Rondônia State, Western Brazil.

Suzi Eszterhas / Lewa Wildlife Conservancy headquarters, Kenya

Juergen Freund / Women viewing shark at Reef Headquarters Aquarium, Townsville, Queensland, Australia

Chris Gomersall / The Lodge, RSPB headquarters, Sandy, Befordshire, UK

Juergen Freund / Tourists view fish at Reef Headquarters, Townsville Aquarium, Queensland, Australia

Juergen Freund / Shark in Reef Headquarters Aquarium, Townsville, Queensland, Australia

Igor Shpilenok / The Zapovednik's headquarters at Borok village near Rybninskoye Sea, Russia.

Luiz Claudio Marigo / Field headquarters of Mamiraua Ecological Stn, Amazonas, Brazil

Juergen Freund / Reef Headquarters, Aquarium in Townsville, Queensland, Australia

Yva Momatiuk & John Eastcott / American Elk (Cervus elaphus nelsoni) females and calves resting near park headquarters, Yellowstone National Park, Wyoming

Stephen Belcher / Sticker of the Indonesian Rhino Conservation Program at the Rhino Protection Unit headquarters, Way Kambas National Park, Sumatra, Indonesia

Ingo Arndt / Sign at Parc National Des Volcans headquarters, Rwanda