Juergen Freund / Split-level shot of Leatherback sea turtle (Dermochelys coriacea) baby swimming in the sea near the beach. Warmamedi beach, Bird's Head Peninsula, West Papua, Indonesia, July 2009

Juergen Freund / Leatherback turtle (Dermochelys coriacea) baby speeding towards the sea. Warmamedi beach, Bird's Head Peninsula, West Papua, Indonesia, July 2009

Juergen Freund / Newly hatched Leatherback turtle (Dermochelys coriacea) babies moving from the nest towards the sea. Warmamedi beach, Bird's Head Peninsula, West Papua, Indonesia, July 2009

Gerrit Vyn / Willow Ptarmigan (Lagopus lagopus) male standing on snow covered ground, vocalising in spring courtship. Males retain the white body plumage of winter plumage and molt the head and neck feathers to th...

David Tipling / Steller's sea eagle {Haliaeetus pelagicus} off Rausu, Shiretoko Peninsula, Hokkaido, Japan, February

Winfried Wisniewski / Ruff (Philomachus pugnax) male at lek, Varanger Peninsula, Norway

Winfried Wisniewski / Ruff (Philomachus pugnax) males fighting at lek, Varanger Peninsula,Norway

Erlend Haarberg / Herring gull (Larus argentatus) head portrait, Vardo, Varanger-peninsula, Finnmark, Norway, July

Norbert Wu / Leopard Seal (Hydrurga leptonyx) with Chinstrap Penguin (Pygoscelis antarctica) prey, Palmer Station, Antarctic Peninsula, Antarctica

Sergey Gorshkov / Willow grouse / ptarmigan (Lagopus lagopus) head portrait, Agapa River, Taimyr Peninsula, Siberia, Russia

Rod Williams / Male Rhinoceros Hornbill (Buceros rhinoceros) head in profile. Captive. Endemic to Malay Peninsula, Sumatra, Java, Borneo. UK, May.

Juergen Freund / Split-level shot of Leatherback sea turtle (Dermochelys coriacea) baby swimming in the sea near the beach. Warmamedi beach, Bird's Head Peninsula, West Papua, Indonesia, July 2009

Gerrit Vyn / Willow Ptarmigan (Lagopus lagopus) male standing on snow covered ground, vocalising in spring courtship. Males retain the white body plumage of winter plumage and molt the head and neck feathers to th...

Gerrit Vyn / Willow Ptarmigan (Lagopus lagopus) male standing on snow covered ground, in spring. Males retain the white body plumage of winter plumage and molt the head and neck feathers to the russet brown summer...

Claudio Contreras / Head and eyes of American white pelican (Pelecanus erythrorhynchos) captive, Yucatan Peninsula, Mexico, March

Suzi Eszterhas / Gentoo Penguin (Pygoscelis papua) vocalizing on nest, Booth Island, Antarctica

Inaki Relanzon / American bald eagle (Haliaeetus leucocephalus) head portrait, Homer, Kenai Peninsula, South Alaska, USA

Inaki Relanzon / Bald Eagle (Haliaeetus leucocephalus) head portrait, Homer, Kenai Peninsula, South Alaska, USA

Inaki Relanzon / American bald eagle (Haliaeetus leucocephalus) head portrait, Homer, Kenai Peninsula, South Alaska, USA

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) portrait, Yankee Harbor, Antarctica

Yva Momatiuk & John Eastcott / Chinstrap Penguin (Pygoscelis antarctica) alertly looking, Yankee Harbor, Antarctica

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) chick vocalizing, Yankee Harbor, Antarctica

Thomas Lazar / Bald Eagle (Haliaeetus leucocephalus) adult on sea ice with head raise giving territory call, standing with wings out encircling fish in talons, protecting food from other nearby adults, Kenai Peninsu...

Yva Momatiuk & John Eastcott / Northern Gannet (Morus bassanus) pair fencing with their bills in greeting ritual, Bonaventure Island breeding colony, Quebec, Gaspesie Peninsula, Canada

Yva Momatiuk & John Eastcott / Northern Gannet (Morus bassanus) close-up portrait sleeping with head tucked in back feathers, Bonaventure Island breeding colony, Quebec, Gaspesie Peninsula, Canada

Konrad Wothe / Snowy Owl (Nyctea scandiaca) mother at nest with chick, Taymyr Peninsula, Russia

Konrad Wothe / Snowy Owl (Nyctea scandiaca) mother at nest with chicks, Taymyr Peninsula, Russia

Colin Monteath / Chinstrap Penguin (Pygoscelis antarctica) group observed by tourists, Baily Head, Deception Island, South Shetland Islands, Antarctica Peninsula, Antarctica

Colin Monteath / Chinstrap Penguin (Pygoscelis antarctica) adult calling, Hydrurga Rocks, Antarctic Peninsula, Antarctica

Tui De Roy / Adelie Penguin (Pygoscelis adeliae) incubating adult snowed in on nest, Petermann Island, Antarctica

Tui De Roy / Chinstrap Penguin (Pygoscelis antarctica) parent regurgitating Antarctic Krill (Euphausia superba) for chick, Cape Lookout, Elephant Island, Antarctic Peninsula, Antarctica

Hiroya Minakuchi / Southern Right Whale (Eubalaena australis) at surface with Kelp Gull (Larus dominicanus) picking off skin, Valdes Peninsula, Argentina

Hiroya Minakuchi / Southern Right Whale (Eubalaena australis) at surface with Kelp Gull picking off skin, Valdes Peninsula, Argentina

Hiroya Minakuchi / Southern Right Whale (Eubalaena australis) white morph at surface with Kelp Gull (Larus dominicanus) picking off skin, Valdes Peninsula, Argentina

Hiroya Minakuchi / Southern Right Whale (Eubalaena australis) at surface with Kelp Gull (Larus dominicanus) picking off skin, Valdes Peninsula, Argentina

Hiroya Minakuchi / Southern Right Whale (Eubalaena australis) with Kelp Gull (Larus dominicanus) picking off lice, Valdes Peninsula, Argentina

Hiroya Minakuchi / Southern Right Whale (Eubalaena australis) with Kelp Gull (Larus dominicanus) picking off whale skin, Valdes Peninsula, Argentina

Martin Willis / Golden-shouldered Parrot (Psephotus chrysopterygius) chick looking out of nest hole, Cape York Peninsular, Queensland, Australia

Kevin Schafer / Black-footed Penguin (Spheniscus demersus) in nest under rock, Cape Peninsula, South Africa