David Shale / Hydromedusa/ Trachymedusa (Crossota sp) from approx 2700m, mid Atlantic ridge, June 2010

Hiroya Minakuchi / Red Kangaroo (Macropus rufus) mother grazing with joey in pouch, Australia

Sandra Bartocha / Pasque Flower (Pulsatilla pratensis) in Landkreis Demmin, Mecklenburg-Vorpommern, Germany, April

Solvin Zankl / Fire Ant (Solenopsis geminata) head of a major worker with mandibles used for opening seeds. Specimen photographed using digital focus stacking

Roy Mangersnes / African blood lily (Scadoxus katharinae) flowering the the mist forest around Victoria Falls, Zimbabwe, November

Roland Seitre / Silver Jewel Scarab Beetle (Chrysina optima) on red petals. Poas Volcano National Park, Caribbean Coast, Vara Branca, Costa Rica.

Michael Quinton / Red Fox (Vulpes vulpes) walking in snow, Alaska

Donald M. Jones / Elk (Cervus elaphus) bull bugling, Jasper National Park, Alberta, Canada

Donald M. Jones / Elk (Cervus elaphus) bull bugling, Jasper National Park, Alberta, Canada

Ben Hall / 2020VISION / Red grouse (Lagopus lagopus scoticus) standing on gritstone boulder with flowering heather (Ericaceae sp), Peak District NP, August 2011. Did you know? While the female grouse is incubating her eggs,...

David Maitland / Close up of head of a male miniature Blue-winged olive mayfly (Acentrella sp). The male mayflys head is dominated by its remarkable red 'Turbinate' compound eyes which, directed upwards and phenomenal...

Juergen Freund / Blue sea star on massive Boulder coral (Gardineroseris planulata) North Sulawesi, Indonesia. This coral species is normally found from the Red Sea to Central America, and is relatively uncommon in the...

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) in red seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in total length. Tulamben, Bali, Indonesia, Java Sea, August.

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) camouflaged in red Seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in length. Tulamben, Bali, Indonesia, October.

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) camouflaged in red Seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in length. Tulamben, Bali, Indonesia, October.

Donald M. Jones / Red-breasted Nuthatch (Sitta canadensis), North America

Donald M. Jones / Red-breasted Nuthatch (Sitta canadensis) perching on pine cones, North America

Yva Momatiuk & John Eastcott / Sockeye Salmon (Oncorhynchus nerka) group swimming in fast current during spawning run, Adams River, Roderick Haig-Brown Provincial Park, British Columbia, Canada

Yva Momatiuk & John Eastcott / Sockeye Salmon (Oncorhynchus nerka) group swimming upstream between forested banks during spawning run, Adams River, Roderick Haig-Brown Provincial Park, British Columbia, Canada

Yva Momatiuk & John Eastcott / Sockeye Salmon (Oncorhynchus nerka) group swimming upstream between forested banks during spawning run, Adams River, Roderick Haig-Brown Provincial Park, British Columbia, Canada

Yva Momatiuk & John Eastcott / Sockeye Salmon (Oncorhynchus nerka) group swimming close to surface during spawning run, Adams River, Roderick Haig-Brown Provincial Park, British Columbia, Canada

Markus Varesvuo / Waxwing (Bombycilla garrulus) perched on snow covered Rowan branch (Sorbus sp.) with berries, Kuusamo, Finland, January. No promotion or advertising use in Finland 1st April 2014 to 31st March 2016.

Konrad Wothe / Australian Red Claw Crayfish (Cherax quadricarinatus), Daintree National Park, North Queensland, Queensland, Australia

David Shale / Hydromedusa / Trachymedusa (Crossota sp) showing tentacles, from approx 2700m, mid Atlantic ridge, June 2010

David Shale / Hydromedusa / Trachymedusa (Crossota sp) from approx 2700m, mid Atlantic ridge, June 2010

Edwin Giesbers / Fire ant (Solenopsis sp) worker, with green plant material behind

Alex Hyde / Giant millipede {Aphistogoniulus sp} running across leaf litter on rainforest floor. Andasibe-Mantadia National Park, Eastern Madagascar.

Alex Hyde / Spinybacked orb weaver spider (Gasteracantha sp.} photographed on white background, tropical rainforest, Andasibe-Mantadia NP, Madagascar

Alex Hyde / Giant millipede {Aphistogoniulus sp} on tree trunk in lowland rainforest. Masoala Peninsula National Park, north east Madagascar.

Steve Gettle / Black-capped Chickadee (Poecile atricapillus), Kellogg Bird Sanctuary, Michigan

Steve Gettle / Black-capped Chickadee (Poecile atricapillus), Kellogg Bird Sanctuary, Michigan

Steve Gettle / Scarlet Tanager (Piranga olivacea) male, Huron Meadows Metropark, Michigan

Steve Gettle / Black-capped Chickadee (Poecile atricapillus), Huron Meadows Metropark, Michigan

Steve Gettle / Red-winged Blackbird (Agelaius phoeniceus) male calling, Kensington Metropark, Michigan

Steve Gettle / Northern Cardinal (Cardinalis cardinalis) male, Brighton, Michigan

Steve Gettle / Dark-eyed Junco (Junco hyemalis) on branch with frozen berries, North America

Steve Gettle / Black-capped Chickadee (Poecile atricapillus) with berries, North America

Yva Momatiuk & John Eastcott / Cape Buffalo (Syncerus caffer) bull with Red-billed Oxpecker (Buphagus erythrorhynchus) pair, Masai Mara National Reserve, Kenya

Georgette Douwma / Tree coral (Dendronephthya sp) on sandy sea bed. Rinca, Komodo National Park, Indonesia

Edwin Giesbers / Star clover (Trifolium stellatum) flower, Menorca, Balearic Islands, Spain, Europe

Stephen Dalton / Maple (Acer sp) leaves in autumn

Sergey Gorshkov / Red Fox (Vulpes vulpes) yawning, Kamchatka, Russia

Alan Watson / Alpine paintbrush (Castilleja rhexifolia) in an alpine meadow along the Rockwall trail, Kootenay National Park, British Columbia, Canada. (World Heritage Site)July 2009

Stephen Dalton / Red rose (Rosa sp), petal whorl, flower

Suzi Eszterhas / Digger Bee (Melissodes sp) pollinating Engelmann Prickly Pear (Opuntia engelmannii) flower, Red Corral Ranch, Texas

Ingo Arndt / Red Wood Ant (Formica rufa) mass sunbathing at nest, Hessen, Germany

Michael Durham / Red-legged Frog (Rana aurora) near Circle Creek along coast, Oregon

Michael Durham / Red Imported Fire Ant (Solenopsis invicta), also known as RIFA, worker portrait, highly invasive introduced species, Texas

Yva Momatiuk & John Eastcott / Red Fox (Vulpes vulpes) hunting, Denali National Park, Alaska

Wild Wonders of Europe / Hermansen / Tutsan (Hypericum androsaemum) flower and fruit, Burren National Park, County Clare, Republic of Ireland, June 2009

Wild Wonders of Europe / Widstrand / Poppy fields (Papaver sp) Lake Kerkini, Macedonia, Greece, May 2009

Albert Lleal / Red-footed Tortoise (Geochelone carbonaria), native to South America

David Shale / Decapod {Systellaspis sp} from midwater catch 195-498m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea squid (Histioteuthis sp) showing funnel, from between 188m/617ft and 507m/1,663ft depth, night, Mid-Atlantic Ridge, North Atlantic Ocean

Jack Dykinga / Penstemon (Penstemon sp) in flower against Saguaro cactus (Carnegiea gigantea) Finger Rock Canyon, Santa Catalina Mountains, Arizona, USA

Katherine Feng / Lesser Panda (Ailurus fulgens) eating bamboo, endangered, Wolong Nature Reserve, China

Richard Du Toit / Hippopotamus (Hippopotamus amphibius) male with Red-billed Oxpecker (Buphagus erythrorhynchus) pair on back, Chobe National Park, Botswana

Fred Bavendam / Crescent-tail Bigeye (Priacanthus hamrur) in front of a sea fan, Uepi Island, Solomon Islands

Fred Bavendam / Banded Reef Cod (Epinephelus fasciatus), Bali, Indonesia

Fred Bavendam / White-tipped Soldierfish (Myripristis vittata) school, Nusa Penida, Indonesia

Philippe Clement / Colourful tulips (Tulipa sp.) and Japanese cherry tree (Prunus serrulata) blossom in flower garden of Keukenhof, the Netherlands, April 2009

Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull, western Montana

Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull in velvet with Canadian Rockies backdrop, western Alberta, Canada

Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull bugling, western Montana

Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull with aspens, western Alberta, Canada

Martin van Lokven / Red-eyed Tree Frog (Agalychnis callidryas), Laguna del Lagarto, Boca Tapada, Costa Rica

Chris Newbert / Soft Coral (Dendronephthya sp) on reef, Indonesia

Sebastian Kennerknecht / San Francisco Garter Snake (Thamnophis sirtalis tetrataenia) on pond vegetation, Pescadero, California

Thomas Marent / Red Ruffed Lemur (Varecia rubra) portrait, Masoala National Park, Madagascar

Thomas Marent / Cotton-top Tamarin (Saguinus oedipus) in tree, northern Colombia

Thomas Marent / Red Howler Monkey (Alouatta seniculus) calling, Peru

Silvia Reiche / Red Admiral (Vanessa atalanta), Hoogeloon, Netherlands. Sequence 13 of 14

Kerstin Hinze / Bromeliad flower (Guzmania sp) flowering indoor house plant

Kevin Schafer / Red-breasted Toucan (Ramphastos dicolorus) calling, Itatiaia National Park, Brazil

Tim Fitzharris / Red-eyed Tree Frog (Agalychnis callidryas), Costa Rica

Thomas Marent / Harlequin Poison Dart Frog (Dendrobates histrionicus) on bromeliad, Cauca, Colombia

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

Thomas Marent / Red-eyed Tree Frog (Agalychnis callidryas), Cahuita National Park, Costa Rica

Solvin Zankl / Deepsea marine planktonic Copepod {Euchirella sp} Atlantic ocean

Ross and Diane Armstrong / Sea Apple (Pseudocolochirus sp) sea cucumber attached to coral, Komodo Island, Indonesia

Mark Raycroft / Red Fox (Vulpes vulpes) portrait, Canada

Tui De Roy / Dewflowers (Drosanthemum sp) and other blooms, Little Karoo, South Africa

Pete Oxford / Red-lored Parrot (Amazona autumnalis) pair sitting on branch, Ecuador

Sergey Gorshkov / Red Fox (Vulpes vulpes) on snow, Kamchatka, Russia

Sergey Gorshkov / Red Fox (Vulpes vulpes) smelling snow, Kamchatka, Russia

Sergey Gorshkov / Red Fox (Vulpes vulpes), Kamchatka, Russia

Thomas Marent / Red-eyed Tree Frog (Agalychnis callidryas) on Heliconia (Heliconia sp) flower, Cahuita National Park, Costa Rica

Thomas Marent / Red-eyed Tree Frog (Agalychnis callidryas) on Heliconia (Heliconia sp) flower, Cahuita National Park, Costa Rica

Thomas Marent / Red-necked Wallaby (Macropus rufogriseus) mother with baby, Bunya Mountains National Park, Australia

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

Theo Allofs / Bengal Tiger (Panthera tigris tigris) 11 months old cub walking on rocky ledge in front of red cliff, April, dry season, Bandhavgarh National Park, India

Theo Allofs / Lechwe (Kobus leche) and Cattle Egret (Bubulcus ibis) in Moremi Game Reserve, Okavango Delta, Botswana

Jeff Rotman / Thorny Sea Horses (Hippocampus histrix) on Alcyonarian coral (Dendronephthya sp.). Israel, Red Sea.

Mitsuaki Iwago / Cape Buffalo (Syncerus caffer) eyeing Red-billed Oxpecker (Buphagus erythrorhynchus), Serengeti National Park, Tanzania

ZSSD / Scarlet Macaw (Ara macao) pair kissing, native to South America

Michael Durham / Mountain Lion (Puma concolor) uncovers a young Elk (Cervus elephus nelsoni) calf that it killed and covered with debris earlier, Wallowa County, Oregon * tags and tracking collar on cat were digitally...