Marie Read / California quail (Callipepla californica), male emerging from behind snowbank in winter, Mono Lake Basin, California, USA

Ole Jorgen Liodden / Landscape of Lillehooksbreen glacier at Svalbard, Norway, July 2008.

Dong Lei / Kawakarpo Mountain, view to summit with drifts of snow and the moon setting, Meri Snow Mountain National Park, Yunnan Province, China. May 2010.

Markus Varesvuo / Puffin (Fratercula arctica) silhouetted at sunset, Shetland Islands, Scotland, UK, July.

Floris van Breugel / Autumnal landscape with snow, Arrigetch Peaks region of Brooks Range, Gates of the Arctic National Park, Alaska, USA, August 2014.

Pal Hermansen / Aerial view of crater lake in snowy mountain, near Landmannalaugar, Iceland, June 2014.

Kirkendall-Spring / Mount Rainier reflected in tarn above Mystic Lake in Mount Rainier National Park, Washington, USA, August 2014.

Bert Willaert / View from the top of the Ozarde waterfalls near Koyna Lake during the monsoon. Western Ghats, India, August 2010.

Nick Garbutt / The view at night from 'At the Top', 124th floor of the Burj Khalifa, the world's tallest building at 829.8m at night. Dubai, United Arab Emirates. April 2013

Alex Mustard,Alex Mustard / Green surf anemones (Anthopleura xanthogrammica) grow in shallow water below the temperate rain forest. Browning Pass, Port Hardy, Vancouver Island, British Columbia, Canada. North East Pacific Ocean.

Andrew Parkinson / Gannet (Morus bassanus) sub-adults roosting on a coastal rock Shetland Islands, Scotland, UK, July

Andrew Parkinson / Cliff top view of a gannet (Morus bassanus) colony. Shetland Islands, Scotland, UK, July.

Andy Rouse,Andy Rouse / Aerial view of Lesser Flamingos (Phoenicopterus / Phoeniconaias minor) in flight. Lake Magadi, Kenya.

Paul D Stewart / Aerial view of Grand Prismatic thermal spring in Yellowstone National Park, USA. The bright colours are natural, coming from thermophile bacteria in the water. People can be seen walking on the raised...

Alex Mustard / Yellow tube sponge (Aplysina fistularis) top view of tubes with water swirling around them, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Nick Garbutt / Atlantic puffins (Fratercula arctica) gathering around burrows on cliff top, Isle of Lunga, Treshnish Isles, Isle of Mull, Scotland, UK, June

Bert Willaert / Amplectant pair of Natterjack Toads (Epidalea / Bufo calamita) with reflection in water. Belgium, Europe, July.

Martin Gabriel / Stag Beetle (Lucanus cervus) pair mating. Bavaria, Germany, June.

Sea & See / Cruising yacht viewed from top of mast. All non-editorial uses must be cleared individually.

Rick Tomlinson / View of crowded harbour from the top of 'Zafera's' mast at night during the Monaco Boat Show, September 2011. All non-editorial uses must be cleared individually.

Grzegorz Lesniewski / Dawn rising behind Polonina Carynska. Bieszczady National Park, the Carpathians, Poland, October 2009.

John MacPherson / 2020VISION / Bottlenose dolphin (Tursiops truncatus) two breaching in evening light, Moray Firth, Inverness-shire, Scotland, UK, August, sequence 2/2. Photographer quote: 'A day of overcast cloud cleared in the la...

Philippe Clement / The mountain Torre dei Scarperi in the Dolomites, Italy. July 2010.

Jurgen Freund / Face of a Common lionfish (Pterios volitans) on top of the reef. Lembeh Strait, North Sulawesi, Indonesia

Kim Taylor / Wood Ant (Formica rufa) workers on top of their nest synchronise ejection of formic acid droplets to maximise deterrent effect on potential predator, UK. Commended in the Audubon Society of Greater De...

Orsolya Haarberg,Orsolya Haarberg / The fishing village of Lovund, with the top of Tomskjevelen (Tomma island) in the background, Luroy, Helgeland, Nordland, Norway, July 2009.

Pete Oxford / Finch specimens at the Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands, L to R Top: Large Ground Finch (Geospiza magnirostris), Woodpecker Finch (Cactospiza pallidu...

Anup Shah / Cape buffalo (Syncerus caffer) head portrait of male, with Cattle egret on its back (Bubulcus ibis). Masai Mara National Reserve, Kenya. February.

Michael D. Kern / Zoo Atlanta / Lemur leaf frog (Hylomantis lemur) mating pair, captive, Critically endangered, from Central America

Thomas Lazar / Sunlight creating a rainbow in the spray of the Bridalveil Falls, Yosemite National Park, California, USA, June 2008

Jerry Monkman / A man climbs "Top of the Prow" rock on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Jerry Monkman / A man rock climbing near the top of Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Wild Wonders of Europe / Sá / View of buildings on the coast from cliff top, Deserta Grande, Desertas Islands, Madeira, Portugal, August 2009

Andy Rouse / Puffin (Fratercula arctica) standing on cliff top, Fair Isle, Shetland Islands, UK

Angelo Gandolfi / Lammergeier (Gypaetus barbatus) flying over the Pyrenees mountains, Aragon, Spain.

Michael Hutchinson / Feral pigeon / rock dove (Columba livia) perched on top of Empire State Building with view of Manhattan below, New York City, USA

Michael Hutchinson / Feral pigeon / rock dove (Columba livia) perched on top of Empire State Building with view of Manhattan below, New York City, USA

Wild Wonders of Europe / E Haarberg / Alpine ibex (Capra ibex ibex) standing on cliff top in snow, Gran Paradiso National Park, Italy, November 2008

Brandon Cole / Top view of Pacific white-spotted Eagle Ray (Aetobatus laticeps), Galapagos, Pacific Ocean

Thomas Marent / Crimson-patched Longwing (Heliconius erato) butterfly, Colombia

Thomas Marent / Banana Spider (Nephila clavipes) female and smaller male, Bocas del Toro, Panama

Thomas Marent / Peacock Butterfly (Inachis io) on flowers, Switzerland

Thomas Marent / Silver-washed Fritillary (Argynnis paphia) butterfly, Switzerland

Thomas Marent / Red Stink Bug (Pycanum rubeus) nymph, Sepilok, Borneo, Malaysia

Albert Lleal / Celebes Leaf Insect (Phyllium celebicum), native to southeast Asia

Albert Lleal / Holothuroidean (Oneirophantites tarraconensis) fossil, 15 cm in length, Spain

Ingo Arndt / Monarch (Danaus plexippus) butterfly feeding on nectar of Goldenrod during migration, East Coast, USA

Ingo Arndt / Blue Morpho (Morpho peleides) caterpillar hatching out of egg, Costa Rica