Andy Rouse / King penguin (Aptenodytes patagonicus) male protecting female from another male, Falkland Islands

Andy Rouse / Gentoo penguin (Pygoscelis papua) group on iceberg, Mikkelsen Harbour, Antarctica

Wild Wonders of Europe / Novák / Barnacle goose (Branta leucopsis) flock in flight at sunset, Westerhever, Germany, April 2009

Solvin Zankl / Female Olive ridley sea turtle (Lepidochelys olivacea) swimming from the open ocean towards the beach of Ostional, Costa Rica, Pacific Ocean to gather for an arribada (mass nesting event). November

Floris van Breugel / Twilight descends on photographer's mountain camp with light inside tent, in Oregons highest mountain forest on Drake Peak at 8,500 feet. Oregon, USA, January 2010.

Toby Roxburgh / Cleaning and processing of King scallops (Pecten genus) prior to auction at Brixham Harbour, Devon, England, UK, 2009.

Eric Baccega / Grizzly bear (Ursus arctos horribilis) attempting to catch Salmon in Brooks river, Katmai National Park, Alaska, USA, July

Mark Carwardine / Southern elephant seals asleep on beach {Mirounga leonina} Falkland Is

Paul Hobson / Two Greater flamingoes sleeping on one leg {Phoenicopterus ruber} Namibia

Pete Oxford / Waved Albatross (Phoebastria irrorata) courtship, Punta Cevallos, Espaola Island, Galapagos Islands, Ecuador, South America. Endemic, Critically endangered

Doug Perrine / Salmon shark {Lamna ditropis} captive, with salmon in mouth (eyes are rolled back for protection), Prince William Sound, Alaska, USA, (digitally modified)

Jeff Rotman / Klunzinger's wrasse (Thalassoma rueppellii / klunzingeri) swimming past diver, Sinai Peninsula, Red Sea, Egypt. Model released. Model released.

Steven Kazlowski / Inupiaq / Inuit man hold his hand under the midnight sun in the Chukchi Sea, off shore from the arctic village of Barrow, Alaska, USA. April 2009

Edwin Giesbers / Four Mallard (Anas platyrhynchos) dabbling for food in icy water. The Netherlands, January.

Neil Lucas / Weddell seal (Leptonychotes weddellii) male surfacing in ice hole, McMurdo Sound, Ross Sea, Antarctica, November 2008

Jose B. Ruiz / Woman walking along beach with parasol. Playa Poniente, Benidorm, Spain.

Jerry Monkman / A young brother and sister walking towards the beach at Center Hill Preserve beach, Plymouth, Massachusetts, USA. Model Released. May 2008

Jerry Monkman / Lone hiker at sunrise on the Bold Coast trail in Cutler, Maine, USA, June 2009. Model released

Peter Cairns / Tourists silhouetted on boardwalk at Midway Geyser Basin. Yellowstone National Park, Wyoming, USA, September.

Roy Mangersnes / Man outside cabin in snowstorm, Agardh Bay, East coast of Spitsbergen, Svalbard, Norway, March 2009. Model released

Alex Hyde / Panther Chameleon {Furcifer pardalis} climbing along branch on beach, Masoala Peninsula National Park, north east Madagascar.

Bryan and Cherry Alexander / Polar bear (Ursus maritimus) picking her way across a lead on chunks of ice. Spitsbergen, Norway, 1993.

Jack Dykinga / Flock of Chilean Flamingos (Phoenicopterus chilensis) feeding, with the reflection of Andean volcanos in the heavily salted waters of this laguna, Atacama Desert, Los Flamencos National Reserve, Chile...

Charlie Summers / Gentoo Penguin (Pygoscelis papua) diving off iceberg and into waters of Pleneau Bay, Antarctica, November

Bryan and Cherry Alexander / Inuit hunter jumping across pancake ice to get to shore. Savissivik, Northwest Greenland, 1991

Nature Production / Green Turtle {Chelonia mydas mydas} juvenile swimming, Ogasawara, Tokyo, Japan