Emperor penguins (Aptenodytes forsteri), Snow Hill Island, Weddell Sea, Antarctica, Polar Regions

Four barn swallow (Hirundo rustica) chicks chirping, Custer State Park, South Dakota, United States of America, North America

Line of four Sandhill crane (Grus canadensis) in a pond silhouetted at sunset, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Four barn swallow (Hirundo rustica) chicks chirp as parent approaches nest with food, Custer State Park, South Dakota, United States of America, North America

Emperor penguins (Aptenodytes forsteri) and chicks, Snow Hill Island, Weddell Sea, Antarctica, Polar Regions

Common Goldeneye (Bucephala clangula) female swimming with four chicks, Lac Le Jeune Provincial Park, British Columbia, Canada, North America

A lone adult emperor penguin (Aptenodytes forsteri), with four adult Adelie penguins (Pygoscelis adeliae), Antarctica, Polar Regions

Four month old Harpy eagle chick (Harpia harpyja), testing its wings in the nest, Alta Floresta, Amazon, Brazil, South America

Common goldeneye (Bucephala clangula) female swimming with four chicks, Lac Le Jeune Provincial Park, British Columbia, Canada, North America

Four fishermen with poles wading through mud during preparation for fish harvest, Rozmberk Pond, UNESCO Biosphere, Trebon, Jindrichuv Hradec District, South Bohemian Region, Czech Republic (Czechia), Europe

Whooper Swan (Cygnus cygnus) and four cygnets swimming, Iceland, Polar Regions

A small pod of four or five killer whales (Orcinus orca) feeding amongst frigatebirds between Fernandina and Isabela Islands, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Four trumpeter swans (Cygnus buccinator), on the river with reflection, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

A small pod of four or five killer whales (Orcinus orca) feeding amongst frigatebirds between Fernandina and Isabela Islands, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Rainbow Lorikeets perched on a branch above Thala Beach, Port Douglas, Queensland, Australia

Four king penguins (Aptenodytes patagonica) on tussock-grass nests, Salisbury Plain, South Georgia, Polar Regions

Four Mallard drakes (Anas platyrhynchos) and a duck flying over frozen lake in snowstorm, Wiltshire, England, United Kingdom, Europe

The Kern Valley Wildlife Refuge in California's Central Valley was created as important resting and feeding grounds for wildfowl migrating along the pacific flyway. After four years of unprecedented drought, the water shortages in California are critical. The reserve has received only 40% of its usual warer, with the result that most of the lake beds are dried up and dessicated, leaving the birds nowhere to go.

The Kern Valley Wildlife Refuge in California's Central Valley was created as important resting and feeding grounds for wildfowl migrating along the pacific flyway. After four years of unprecedented drought, the water shortages in California are critical. The reserve has received only 40% of its usual warer, with the result that most of the lake beds are dried up and dessicated, leaving the birds nowhere to go.

The Kern Valley Wildlife Refuge in California's Central Valley was created as important resting and feeding grounds for wildfowl migrating along the pacific flyway. After four years of unprecedented drought, the water shortages in California are critical. The reserve has received only 40% of its usual warer, with the result that most of the lake beds are dried up and dessicated, leaving the birds few places to go. This is the only area of lake with any water left.

The Kern Valley Wildlife Refuge in California's Central Valley was created as important resting and feeding grounds for wildfowl migrating along the pacific flyway. After four years of unprecedented drought, the water shortages in California are critical. The reserve has received only 40% of its usual warer, with the result that most of the lake beds are dried up and dessicated, leaving the birds nowhere to go.

The Kern Valley Wildlife Refuge in California's Central Valley was created as important resting and feeding grounds for wildfowl migrating along the pacific flyway. After four years of unprecedented drought, the water shortages in California are critical. The reserve has received only 40% of its usual warer, with the result that most of the lake beds are dried up and dessicated, leaving the birds nowhere to go.

Tourist and Magellanic penguins on beach, Carcass Island, Falklands, South America

Four golden eggs in a nest

Canadian Goose (Branta canadensis), lined up together with one bird in focus. These Geese were swimming on Loch Awe on a still and frosty morning, when they came to a halt in a line looking very proud.. Argyll, Scotland

Whooper Swan (Cygnus cygnus) on an early morning flight, slow shutter speed capturing a circular flight around the valley floor. Shot shows valley walls in the background , Scotland

Four golden eggs in a nest

Four golden eggs in a nest

Four adult Adelie penguins (Pygoscelis adeliae) preparing to return to the sea to feed on Paulet Island on the Northeast side of the Antarctic Peninsula.

A blackbirds nest with four eggs

King Penguins (Aptenodytes patagonicus) swimming at surface on South Georgia Island, southern Atlantic Ocean.

Bar-Tailed Godwit (Limosa lapponica) group of four walking together along beach searching for food. Gott Bay, Argyll, Scotland, UK

Four adult Gentoo Penguins (Pygoscelis papua) walking in formation to the sea on the Antarctic Peninsula.

Macaroni Penguin

Four men in a motor boat, from above

Aerial view, Seseke, tributary of the lip, SesekeKunst, Line of Beauty - the fifth treatment plant, Susanne Lorenz, cycle lane, Klaerwerk 4 four sewage treatment plant Kamen, Luenen, Ruhrgebiet region, North Rhine-Westphalia, Germany, Europe

Aerial view, Seseke, tributary of the lip, SesekeKunst, Line of Beauty - the fifth treatment plant, Susanne Lorenz, cycle lane, Klaerwerk 4 four sewage treatment plant Kamen, Luenen, Ruhrgebiet region, North Rhine-Westphalia, Germany, Europe

Water sports, double-coxed fours, young rowers in action

Three jeeps with tourists lost on a trip in the depths of the Sahara, Libya, Africa

beach sand peaceful ocean 4

International German Gymnastics Festival 2009 procession, mounted Police, Frankfurt am Main, Hesse, Germany, Europe

Motor boat from above

Aerial view, Asia, Maldives, North Male Atoll, Kuda Huraa, Four Season Maldives, with beaches and water bungalows, Asia

African Penguins (Spheniscus demersus), couple with molting chick, Boulders Beach, Simon's Town, Western Cape, South Africa, Africa

Aerial view, Asia, Maldives, North Male Atoll, Kuda Huraa, Four Season Maldives, with beaches and water bungalows, Asia

Aerial photo, Bruchhauser Steine, four large porphyry rocks located on a mountain, snow, winter, Olsberg, Sauerland, North Rhine-Westphalia, Germany, Europe

Northern Fulmar (Fulmarus glacialis) four adult birds on a cliff, Norfolk, England, United Kingdom, Europe

Aerial view, Asia, Maldives, North Male Atoll, Kuda Huraa, Four Season Maldives, with beaches and water bungalows, Asia

Boats at the Ponta da Piedade in Lagos, Algarve, Portugal, Europe

Goose Girl, girl with four geese as decoration on a building wall, 33 Grand'Rue, Ammerschwihr, Alsace, France, Europe

Four seagulls perching on rock, Ballestas Islands, Paracas National Reserve, Ica Region, Peru

Four cormorants sitting on a rock.

Four King Penguins (Aptenodytes Patagonicus) On A Beach Walking In A Row, South Georgia, South Georgia, South Georgia And The South Sandwich Islands, United Kingdom

Common loon (Gavia immer), an adult loon carries two babies on his back when the other adult feeds on of them with a damselfly larva, La Mauricie National Park; Quebec, Canada

Common loon (Gavia immer), an adult loon carries two babies on his back, La Mauricie National Park; Quebec, Canada

Willow Ptarmigans (Lagopus lagopus) standing in snow with white winter plumage in Arctic Valley, South-central Alaska, Alaska, United States of America

Four King Penguins (Aptenodytes Patagonicus) Walking Together On Beach, Antarctica

A group of four adult King penguins at the water's edge walking into the water, at sunrise. Reflected light, Fortuna Bay, South Georgia Island

Four Swans are accompanied by four Canada Geese in the early morning sun.

Common Redpoll (Acanthis flammea) on rock, GreenlandIt is one of the four sparrows that makes the great migration and thus crosses the Greenland Sea to nest in the recessed places of Greenland.