Mark Taylor / Australian Shepherd pup, age 16 weeks, in play-bow stance.

Edwin Giesbers / Barbary macaque (Macaca sylvanus) baring teeth as a sign of submission, Gibraltar Nature Reserve, Gibraltar,

Juergen Freund / Rangers catching a Green turtle (Chelonia mydas) for tagging and release, Tetepare Island reserve, Solomon Islands, July 2010

Juergen Freund / Fluorescent coral viewed under UV light, Misool, Raja Ampat, West Papua, Indonesia, sequence 2/2

Juergen Freund / Old coral reef destroyed by dynamite fishing. New corals are not able to colonise the rubble. Misool, Raja Ampat, West Papua, Indonesia, January 2010

Juergen Freund / School of Bigeye jacks / trevally (Caranx sexfasciatus) and Yellow line / Yellowstripe scads (Selaroides leptolepis). Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / School of Bigeye jacks / trevally (Caranx sexfasciatus). Misool, Raja Ampat, West Papua, Indonesia

Juergen Freund / Colorful coral reef with soft corals (Alcyonacea) and fan corals (Gorgonacea). Misool, Raja Ampat, West Papua, Indonesia, January

Juergen Freund / Leatherback turtle (Dermochelys coriacea) underwater. Kei islands, Indonesia, November

Juergen Freund / Estuary / Spotted / Common seahorse (Hippocampus kuda) in the rubble. Lembeh Strait, Sulawesi, Indonesia

Juergen Freund / Juvenile Barramundi cod (Cromileptes altivelis). Lembeh Strait, Sulawesi, Indonesia

Juergen Freund / Yellow Shortfin lionfish (Dendrochirus brachypterus) face. Lembeh Strait, Sulawesi, Indonesia

Juergen Freund / Leatherback turtle eggs weighed and measured before relocation-burying to hatchery by State Universiti of Papua (UNIPA) students and WWF staff Daro Tadu. Warmamedi beach, Bird's Head Peninsula, West P...

Juergen Freund / Split level shot of mating Green turtles (Chelonia mydas) in the reef shallows. Sipadan Island, Sabah, Malaysia, June

Juergen Freund / Green turtle (Chelonia mydas) portrait. Sipadan Island, Semporna, Sabah, Malaysia

Juergen Freund / Four Green turtles (Chelonia mydas) looking for resting places on the reef. Sipadan Island, Semporna, Sabah, Malaysia, June

Juergen Freund / Green turtle (Chelonia mydas) swimming through the sea near a coral reef, seen from above. Sipadan Island, Semporna, Sabah, Malaysia, June

Sergey Gorshkov / Red fox (Vulpes vulpes) one fox chasing another across snow, Kamchatka, Far east Russia, April

Laurent Geslin / Black backed jackal, submission {Canis mesomelas} Skeleton Coast, Namibia

David Pike / Gelada baboon lip flip display (uncertainty) {Theropithecus gelada} Simien mtn NP, Ethiopia

Laurent Geslin / Two male urban Red foxes, mouths open, one in submissive posture {Vulpes vulpes} London, UK

Luciano Candisani / Black-browed Albatross (Thalassarche melanophrys) chick begging parent for food, Saunders Island, Falkland Islands

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) parent feeding begging chicks on nest, Booth Island, Antarctic Peninsula, Antarctica

Donald M. Jones / Pileated Woodpecker (Dryocopus pileatus) mother at nest cavity with begging chicks, Montana

Cyril Ruoso / Eastern Chimpanzee (Pan troglodytes schweinfurthii) , Frodo the dominant male and hunter, eating a Red River Hog (Potamochoerus porcus) piglet with two females begging, Gombe National Park, Tanzania

Martin Willis / Budgerigar (Melopsittacus undulatus) father with begging chick at nest cavity, Queensland, Australia

Willi Rolfes/ BIA / Alpine Marmot (Marmota marmota) parent feeding with begging young, Hohe Tauern National Park, Austria

Heike Odermatt / King Penguin (Aptenodytes patagonicus) chick begging for food, Saunders Island, Falkland Islands

Suzi Eszterhas / Snowy Egret (Egretta thula) four week old chick begging for food, Sonoma County, California

Michael Quinton / Northern Flicker (Colaptes auratus) entering nest cavity with begging chicks, Alaska

Michael Quinton / Northern Flicker (Colaptes auratus) at nest cavity with begging chicks, Alaska

Bruno de Faveri / Arctic Tern (Sterna paradisaea) with begging chick, Farne Islands, England, United Kingdom

Roland Seitre / Eastern Wolf (Canis lupus) showing submissive behavior to dominant individual, Omega Park, Montebello, Quebec, Canada

Heike Odermatt / Black-browed Albatross (Thalassarche melanophrys) chick begging for food, Falkland Islands

Steve Gettle / Barn Swallow (Hirundo Rustica) feeding chicks in nest, Michigan

Steve Gettle / Barn Swallow (Hirundo Rustica) feeding, Michigan

Pete Oxford / Gentoo Penguin (Pygoscelis papua) chick begging for food from parent, Saunders Island, Falkland Islands

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) chick begging parent for food, western Antarctica

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) chick begging parent for food, on beach, fall, Gold Harbour, South Georgia Island, Southern Ocean, Antarctic Convergence

Sumio Harada / American Robin (Turdus migratorius) newly-hatched day old chicks begging in nest with unhatched blue egg, Glacier National Park, Montana

Gerry Ellis / African Elephant (Loxodonta africana) infant begging mother to nurse, Amboseli National Park, Kenya

Gerry Ellis / Gentoo Penguin (Pygoscelis papua) parent and chicks begging for food on nest, South Georgia Island

Konrad Wothe / Timber Wolf (Canis lupus) mother with two pups begging for food at den entrance, Pine County, Minnesota

Konrad Wothe / Barn Swallow (Hirundo rustica) chicks lined up in nest with their mouths open waiting for food, Germany

Konrad Wothe / Blue Tit (Cyanistes caeruleus) parent delivering caterpillar to chicks in nest, Europe

Tim Fitzharris / Timber Wolf (Canis lupus) mother with affectionate pup, Montana

Mark Raycroft / Pomeranian (Canis familiaris) adult sitting up