Bryan and Cherry Alexander / Aerial view of Caribou / Reindeer (Rangifer tarandus) crossing lake during summer migration. Hudson Bay, Canada, 2004.

Bryan and Cherry Alexander / Aerial view of Caribou / Reindeer (Rangifer tarandus) migrating across the tundra in summer. Hudson Bay, Canada, 2004.

Richard Du Toit / Aerial view of herd of Dromedary camels (Camelus dromedarius) with long shadows, northern Kenya

Juergen Freund / Aerial of Pelicans (Pelecanus conspicillatus) at Lake Machattie, where their breeding site was flooded. Queensland, Australia, June 2011

Juergen Freund / Aerial of a solitary Dromedry camel (Camelus dromedarius) crossing a claypan in the Simpson Desert Regional Reserve. An estimate of 1.5 million wild camels roam the desert outback of Australia. South...

Juergen Freund / Aerial of Camel (Camleus sp) footprints across the claypans in the Simpson Desert Regional Reserve. An estimated of 1.5 million wild Dromedary and Bactarian camels roam the desert outback of Australia...

Roland Seitre / Aerial view of fish cage for fish farming Southern bluefin tuna (Thunnus maccoyii), Port Lincoln, South Australia, Critically Endangered species. Wild caught fish are reared in large fish cages for ma...

Bryan and Cherry Alexander / Just visible line of Emperor penguins (Aptenodytes forsteri) crossing a vast Antarctic landscape. Snow Hill Island, Antarctica, October.

Bryan and Cherry Alexander / Group of Emperor penguins (Aptenodytes forsteri) stopping by a lead in the sea ice. Snow Hill Island, Antarctica, October.

Bryan and Cherry Alexander / Emperor penguins (Aptenodytes forsteri) crossing the sea ice, Antarctica.

Frederique Olivier / Aerial view of Royal Penguin (Eudyptes schlegeli) rookery on coast, Macquarie Island, Southern Atlantic, Australian Antarctica, December 2007

Frederique Olivier / Aerial view of Royal Penguin (Eudyptes schlegeli) colony at Hurd Point, Macquarie Island, Southern Atlantic, Australian Antarctica, November 2007