Chris & Monique Fallows / Sooty Albatros (Phoebetria fusca) at sea off South Georgia Island, Antarctica

Anup Shah / Lion-tailed macaque (Macaca silenus) juvenile portrait. Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Philippe Clement / Peppered water boatman (Notonecta maculata) on white background, Belgium. May.

Philippe Clement / Peppered water boatman (Notonecta maculata) on white background, Belgium. May.

Robin Chittenden / Red-footed Falcon (Falco vespertinus) in flight, Suffolk, UK, May 2013

Robin Chittenden / Red-footed Falcon (Falco vespertinus) in flight, Suffolk, UK, May

Robin Chittenden / Hobby (Falco subbuteo subbuteo) in flight, Suffolk, UK, May

Kim Taylor / Tawny Cockroach (Ectobius pallidus) female with egg sac / ootheca, against white background, Surrey, England

Kim Taylor / Rainforest moth (Cosmosoma sp.) against white background, Costa Rica

Kim Taylor / Leaf Mantis (Choeradodis species) against a white background, Costa Rica

Kim Taylor / St Mark's Fly (Bibio marci) male in flight. Surrey, England. May

Kim Taylor / St Mark's Fly (Bibio marci) male in flight. Surrey, England. May

Wild Wonders of Europe / Widstr / Egyptian vulture (Neophron percnopterus) in flight, Madzharovo, Eastern Rhodope Mountains, Bulgaria, May 2013, endangered species.

Wild Wonders of Europe / Widstr / Egyptian vulture (Neophron percnopterus) in flight, Madzharovo, Eastern Rhodope Mountains, Bulgaria, May 2013, endangered species.

Kim Taylor / European Robin (Erithacus rubecula) against white background, Surrey, England, January

Kim Taylor / European Robin (Erithacus rubecula) on a branch, against white background, Surrey, England

Kim Taylor / European Robin (Erithacus rubecula) against white background, Surrey, England

Adrian Davies / Seed head of an Indian lotus (Nelumbo nucifera), showing seeds, scanned on a flatbed scanner, England, UK.

Adrian Davies / Trail left in a Bramble leaf by the larvae of a Pygmy eyecap moth (Stigmella aurella), scanned on a flatbed scanner, Surrey, England, UK.

Adrian Davies / Trail left in a Bramble leaf by the larvae of a Pygmy eyecap moth (Stigmella aurella), scanned on a flatbed scanner, Surrey, England, UK.

Adrian Davies / Foxglove (Digitalis purpurea) photographed on white background under controlled conditions, Surrey, England, UK, June.

Adrian Davies / Cape Sundew (Drosera capensis) sequence showing capture of fly. Digital composite

Adrian Davies / Primrose (Primula vulgaris) pin eyed specimen with protruding stigma, as opposed to protruding stamens (known as thrum eyed)

Suzi Eszterhas / Red-eyed Treefrog (Agalychnis calydryas) on stem, Northern Costa Rica, Central America

Suzi Eszterhas / Red-eyed Treefrog (Agalychnis calydryas) on stem, Northern Costa Rica, Central America

Enrique Lopez-Tapia / Kelp Gull (Larus dominicanus) flying, Danco Island, Antarctica Peninsula. Antarctica.

Nick Upton / Kestrel (Falco tinnunculus) in flight overhead, Cornwall, UK, April.

Nick Upton / Juvenile Herring gull (Larus argentatus) flying with nest material, Gloucestershire, UK, May.

Alex Mustard / Nudibranch (Flabellina lineata), taken in the field in Gulen, Norway. North East Atlantic Ocean.

Alex Mustard / A nudibranch (Dendronotus frondosus) photographed in an aquarium, Gulen, Norway. North East Atlantic.

Alex Mustard / A nudibranch (Adalaria proxima) photographed in an aquarium, Gulen, Norway. North East Atlantic.

Alex Mustard / A nudibranch (Acanthodoris pilosa) photographed in an aquarium, Gulen, Norway. North East Atlantic.

Alex Mustard / Nudibranch (Flabellina lineata) photographed in the field aquarium, Gulen, Norway. North East Atlantic Ocean.

Alex Mustard / A nudibranch (Polycera quadrilineata) photographed in the field aquarium, Gulen, Norway. North East Atlantic.

Alex Mustard / A nudibranch (Onchidoris muricata) photographed in the field aquarium, Gulen, Norway. North East Atlantic.

Alex Mustard / A nudibranch (Cuthona viridis) photographed in the field aquarium, Gulen, Norway. North East Atlantic.

Alex Mustard / A nudibranch (Cuthona viridis: Trinchesia viridis) photographed in the field aquarium, Gulen, Norway. North East Atlantic.

Alex Mustard / Light and dark colour morphs of (Acanthodoris pilosa) nudibranch. Photographed in the field aquarium, on location in Gulen, Norway. North East Atlantic Ocean. Digital composite.

Alex Mustard / Nudibranch (Limacia clavigera), taken in the field aquarium, Gulen, Norway. North East Atlantic Ocean.

Alex Mustard / A nudibranch (Eubranchus pallidus) taken in the field aquarium, , Gulen, Norway. North East Atlantic.

Alex Mustard / A portrait of a nudibranch (Adalaria proxima) on a kelp frond. Gulen, Norway. North East Atlantic Ocean.

Alex Mustard / A portrait of a nudibranch (Flabellina pellucida) on a kelp frond. Gulen, Norway. North East Atlantic Ocean.

Enrique Lopez-Tapia / Antarctic tern (Sterna vittata) in flight above the Antarctic peninsula, Antarctica.

Alex Mustard / Red eye medusa (Polyorchis penicillatus) with its feeding tentacles extended to catch planktonic prey. Note that the bell of the jelly has hitchhiking amphipods (Hyperia medusarum). Browning Pass, Van...

Alex Mustard / Clinging jellyfish (Conionemus vertens) swimming in open water. The orange structures are reproductive organs. This species gets its name because it is able to cling to seagrass and algae. Browning Pa...

Mark Taylor / Black-and-white tuxedo male kitten, 'Tuxie' aged 3 months, using a scratching post.

Jane Burton / Sleepy silver tabby chinchilla Persian male cat, 'Cosmos'.

Jane Burton / Ginger cat 'Benedict' asleep.

Jane Burton / Sleepy ginger female cat 'Lucky'.

Jane Burton / Young ginger cat Sparky climbing showing claws holding on to rough bark.

Michael Pitts / Oriental Sweetlips (Plectorhinchus vittatus) in cave. Maldives.

Alex Mustard / Portrait of an Eastern mosquitofish (Gambusia holbrooki) reflected in the surface of Rainbow River, Florida, United States of America.

Alex Mustard / Portrait of Bluegill (Lepomis macrochirus). Rainbow River, Florida, USA.

Fabrice Cahez / Common chiffchaff (Phylloscopus collybita) searching for insects in Willow (Salix sp) flowers, Vosges, France, April

Fabrice Cahez / Eurasian magpie (Pica pica) in snow, Vosges, France, February

Fabrice Cahez / Eurasian magpie (Pica pica) walking in snow, Vosges, France, February

Claudio Contreras / Northern mockingbird (Mimus polyglottos) in courtship display, San Quintin, Baja California Peninsula, Mexico,

Claudio Contreras / Yellow legged gull (Larus livens) landing, Santispac beach, Bahia Concepcion, Sea of Cortez (Gulf of California), Mexico, May

Loic Poidevin / Black -Tailed Godwit (Limosa limosa) flying, Breton Marsh, West France, April

Ernie Janes / Yellow Labrador portrait in studio

Ernie Janes / Sycamore (Acer pseudoplatanus) new leaves and buds growing.

Ernie Janes / Common Iora (Aegithina tiphia) male at Yala National Park, Sri Lanka

Ernie Janes / Beech (Fagus sylvatica) new shoots against black background.

Tim Laman / King of Saxony Bird of Paradise (Pteridophora alberti) adult male on calling perch above the rainforest canopy. Tari Pass area, Southern Highlands Province, Papua New Guinea.

Tim Laman / King of Saxony Bird of Paradise (Pteridophora alberti) adult male on calling perch above the rainforest canopy. Tari Pass area, Southern Highlands Province, Papua New Guinea.

Tim Laman / King of Saxony Bird of Paradise (Pteridophora alberti) adult male on calling perch, Southern Highlands Province, Papua New Guinea

Tim Laman / King of Saxony Bird of Paradise (Pteridophora alberti) adult male on calling perch. Southern Highlands province, Papua New Guinea

Theo Bosboom / Wood cranesbill (Geranium sylvaticum) flower against white background, Asbyrgi, Iceland, June

Theo Bosboom / Wood cranesbill (Geranium sylvaticum) flower against white background, Asbyrgi, Iceland, June