Andy Rouse / Galapagos green turtle (Chelonia mydas agassisi) underwater portrait, being inquisitive, note algae growing on head and shell

Alex Mustard / Whale shark (Rhincodon typus) silhouette, feeding on floating fish eggs (not visible) just below the surface in calm weather. Note the bow wave ahead of the shark. Isla Mujeres, Quintana Roo, Yucatan...

Roger Powell / Pair of European Bee-eater (Merops apiaster) on a bank above their nest hole in front of flowers. Note regurgitated pellets of insect remains. Alentejo, Portugal, April.

Chadden Hunter / Close up of Husky dog eyes (Canis familiaris), note the different eye colour, Northern Canada. Taken on location for BBC Frozen Planet series, 2009

Alex Mustard / 2020VISION / Pair of Common cuttlefish (Sepia officinalis), female in foreground and male behind, note circular mating scars on female caused by the males suckers, Babbacombe Bay, Torbay, Devon, UK, May. Did you k...

Juergen Freund / Aerial view of private tropical island surrounded by a white sandy beach and coral reefs, note helipad on end of pier, Palawan, Philippines, May 2009.

Brent Stephenson / Campbell Albatross (Thalassarche impavida) swimming on the water with bill wide open in threat display. Note the diagnostic pale eye of this species. Off North Cape, New Zealand, April.

Brent Stephenson / Campbell albatross (Thalassarche impavida) in threat display. Note the diagnostic pale eye of this species. Off North Cape, New Zealand, April.

Stephen Dalton / Woolly aphid (Eriosoma lanigerum) resting, note the independant action of two sets of wings

Stephen Dalton / Garden spider {Araneus diadematus} constructing its orb web, UK, Sequence 5/5 , The final web is complete. Note that although all the final sticky spirals are visible, most of the radials are invisibl...

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback male scratching head, drunk on bamboo shoots, Volcanoes NP, Virunga mountains, Rwanda Note - if gorillas eat an excess of bamboo shoots they ca...

Andy Rouse / Mountain gorilla (Gorilla beringei beringei) silverback male playing in habitat, drunk on bamboo shoots, Volcanoes NP, Virunga mountains, Rwanda Note - if gorillas eat an excess of bamboo shoots they...

Pete Oxford / Whale Shark (Rhincodon typus) swimming with other tropical fish, note satellite tag to right of dorsal fin, Wolf Island, Galapagos Islands, Ecuador

Georgette Douwma / Big-eye or Goggle-eye (Priacanthus hamrur) on wreck. Note colour change from deep red to silver. Egypt, Red Sea

Jane Burton / Spotted seahorse {Hippocampus kuda} light colour phase, note eyes rotating independantly from each other, captive, from Indo-Pacific

Gavin Maxwell / Yarlung gorge, Tibet, May 07, 'Wild China' series Note - world's deepest gorge,

Doug Allan / Icefish {Chaenocephalus aceratus} Antarctica. Note - no scales or haemoglobin, so blood is white

Doug Perrine / Tiger shark (Galeocerdo cuvier) North Shore, Oahu, Hawaii, USA, Central Pacific Ocean, note: parasitic leech on side of face

Jose B. Ruiz / White storks {ciconia ciconia} nesting on purpose made poles, Malpartida de Caceres, Extremadura, Spain. Note - relocated after construction of hotel

Jose B. Ruiz / Silhouette of White storks {ciconia ciconia} nesting on purpose-built poles, Malpartida de Caceres, Extremadura, Spain Note - relocated after construction of hotel

Michael Durham / Honey Bee (Apis mellifera) worker collecting nectar from Red Clover (Trifolium pratense) flowers, note the pollen baskets on the legs, northwest Oregon

Michael & Patricia Fogden / Geoffroy's Tailless Bat (Anoura geoffroyi) visiting an epiphytic Bromeliad (Vriesia sp) note pollen on head and shoulders, Costa Rica

Warwick Sloss / Flower on Bottle baobab tree {Adansonia rubrostripa} Kirindy forest, Madagascar. Note - on location for BBC Planet Earth 'Forests'

Kim Taylor / Tropical luminous click beetle {Pyrophorus sp.} Trinidad, West Indies. Note - photographed by its own bioluminescence

Steven Kazlowski / Polar bear {Ursus maritimus} at truck window, mouth open Coastal plain of the Arctic National Wildlife Refuge, Alaska. Note black tongue

Anup Shah / Aerial view of Ol Doinyo Lengai (The Mountain of God) Volcano, Rift Valley, Tanzania. Note- light gray flows known as 'squeeze-ups' from the highly fluid lava, still active.

Anup Shah / Aerial view of Ol Doinyo Lengai Crater (The Mountain of God) Rift Valley, Tanzania. Note- small cones on crater floor formed by previous eruptions of lava, still active.

Ashok Jain / Baby Indian elephant under mother's legs. Kabini NP India. Note teet between front legs

Pete Oxford / Fiddler crab {Uca genus} Coroni Swamp, Guyana, Caribbean. Note large claw

Gabriel Rojo / South American / Patagonian sealion pair mating {Otaria flavescens} Valdez peninsula, Argentina. Note large difference in size between male and female

Kim Taylor / Forest spider {Argiope sp}, note stabilimentum in centre of web, East Africa

Michael & Patricia Fogden / Leafcutter Ant (Atta sp) group workers carrying leaf segments, note minim riding on leaf as protection against parasitic flies, rainforest, Costa Rica

Hans Christoph Kappel / Trapdoor spider emerging from its den; note 'door' pushed to one side, Spain.

Anup Shah / Portrait of tiger licking paw, Ranthambhore NP, India. Note - Tigers have coarse, abrasive tongues useful for stripping meat from the bone but also for condition their fur.

Konrad Wothe / Honey Bee (Apis mellifera) collecting pollen from willow flower, note full pollen baskets, Germany

Konrad Wothe / Honey Bee (Apis mellifera) collecting pollen from daisy, note pollen baskets on hind legs, Germany

Tony Heald / King cheetah, South Africa. Note pattern on fur differs from the spots of ordinary Cheetah.

Fabio Liverani / Green toad pair in amplexus, note eggs. Italy

Fabio Liverani / Common European toad pair in amplexus. Note eggs round log, Italy

Anup Shah / Spider monkey in tree. Note prehensile tail

Pete Oxford / Pygmy anteater resting {Cyclopes didactylus} Guyana, South America. Note claws for climbing

Yuri Shibnev / Wild Amur leopard with kill near den. Kedrovapad Nature Reserve Far East Russia, Ussuriland, South Primorskiy Region. Note ear tags

Georgette Douwma / Fiddler crab {Uca sp} male at burrow entrance. Bunaken, Sulawesi, Indonesia - note large claw

Martin Dohrn / Lioness head portrait in moonlight Serengeti NP, Tanzania, East Africa. Note dilated pupils. Image taken using 'Starlight Camera' technology without artificial lighting.

Fabio Liverani / Common tree frog pair in amplexus Italy. Note eggs. Life cycle sequence 2

Pat Tuson / Old door in front of skip offered for recycling with a note saying Please Help Yourself, Highbury, London Borough of Islington, UK

Pat Tuson / Old door in front of skip offered for recycling with a note saying Please Help Yourself, Highbury, London Borough of Islington, UK

Fiona Rogers / Western chimpazee (Pan troglodytes verus) infant male 'Flanle' aged 3 years riding on his mothers back - note six digits to right hand which may be a result of inter breeding within such a small commu...

Oriol Alamany / Two women hiking in Noarre along the Haute Route Pyreneene (HRP) , Cardos Valley, Alt Pirineu Natural Park, Pyrenees, Catalonia, Spain. Note the red and white waymarker for long distance paths. Octob...

Alex Mustard / Basking shark (Cetorhinus maximus) feeding at the surface on plankton. Note the sea lampreys beneath the tail (Petromyzon marinus) Cairns Of Coll, Isle of Coll, Inner Hebrides, Scotland, UK, North Eas...

Charlie Summers / Black bear (Ursus americanus) with Dog salmon (Oncorhynchus keta) catch. Note the teeth the male Dog / Chum Salmon grows during the spawning season. Alaska, USA, July

Charlie Summers / African lion (Panthera leo) two cubs in a Sausage tree (Kigalia africana), note mother's tail just above, Serengeti National Park, Tanzania

Roberto Rinaldi / Weedy seadragon (Phylloperyx taeniolatus) close up of male's tail carrying eggs, Australia. Note the eyes of the baby seadragons developing inside the eggs.

Brent Stephenson / Black browed albatross (Thalassarche melanophris) with a squid thrown to attract seabirds to the boat. Note the band on the birds leg, banded as a nestling in March 2005 on Macquarie Island, Australia...

Brent Stephenson / South Island robin (Petroica australis australis) male standing on the ground, note the colour bands. Eglinton Valley, Southland, New Zealand.

LYNN M. STONE / Eastern Brown Pelican (Pelecanus occidentalis carolinensis) in breeding plumage, diving for fish prey; note the closed nictating membrane over eye at the moment of impact. Indian Rocks Beach, Florida,...

LYNN M. STONE / American White Pelican (Pelecanus erythrorynchos) in breeding plumage; note characteristic 'horn', which will drop off later in the breeding season, on upper mandible. Mississippi River, near East Mol...

LYNN M. STONE / Snowy Egret (Egretta thula) in breeding plumage, courtship display with plumes raised; note how characteristic yellow feet of the species have morphed into orange. Osceola County, Florida, USA, March.

LYNN M. STONE / Snowy Egret (Egretta thula) in breeding plumnage, perched on branch; note how the characteristic yellow feet of the species have temporarily morphed to orange. Osceola County, Florida, USA, March.

LYNN M. STONE / Snowy Egret (Egretta thula) in breeding plumnage, perched on branch; note how the characteristic yellow feet of the species have temporarily morphed to orange. Osceola County, Florida, USA, March.

Jean E. Roche / Aerial view of small island with colony of Greater flamingo (Phoenicopterus ruber), the only breeding colony in France, note scientific observatory on the right, Camargue, Southern France, May 2010

Konrad Wothe / Pale throated three toed sloth climbing tree (Bradypus tridactylus) note green algae on fur, Costa Rica

Alex Mustard / 2020VISION / Common edible periwinkle (Littorina littorea) on submerged rocks covered in barnacles and limpets. This species in an important herbivore in this habitat. Note that eyes are visible in this photo. Loc...

Alex Mustard / 2020VISION / Fulmar (Fulmarus glacialis) on nest, note its large nostril, Unst, Shetland Islands, Scotland, UK, North East Atlantic Ocean, April

Steven David Miller / Mertens' water monitor (Varanus mertensi) walking through grass, note skin shedding around head, Lake Kununurra, Western Australia, July

Steven David Miller / Mertens' water monitor (Varanus mertensi) profile, note skin shedding around head, Lake Kununurra, Western Australia, July

Roland Seitre / Rangers using a GPS to note their position. Ishaqbini Reserve, Kenya, 2009.

Roland Seitre / Detail of Mammoth Ivory (free trade) showing structural lines, note the sharp angle crossing of the lines like a prehistoric arrow end. National Fish and Wildlife Forensics Laboratory, Ashland, Oregon...

Roland Seitre / Detail of Elephant Ivory (protected) showing structural lines, note the very flat crossing of the lines like modern house roof. National Fish and Wildlife Forensics Laboratory, Ashland, Oregon, USA

Stephen Dalton / Rookery Pond, Weald of Sussex, UK, June 2011 - note Ragged robin, Horse-tail, Water dropwort, Marsh thistle, Buttercup and Speedwell, and Blue damselflies,

Stephen Dalton / Rookery Pond, Weald of Sussex, UK, June 2011 - note Ragged robin, Horse-tail, Water dropwort, Marsh thistle, Buttercup and Speedwell, and Blue damselflies,

Stephen Dalton / Common carder bumblebee (Bombus pascuorum) flying from Betony flowers, note the strong aerodynamic forces on the wing during this manoeuvre, UK

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) looking at its hatching egg. Note hole where chick can be seen breaking through shell. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Adelie Penguin (Pygoscelis adeliae) incubating two eggs. Note the bare brood patch. Yalour Islands, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Pied cormorant (Phalacrocorax varius) resting on a rock. Note concentrated salt water droplet dripping from bill tip. Kaikoura, Canterbury, New Zealand, October.

Brent Stephenson / Juvenile Spur-winged Plover / Masked Lapwing (Vanellus miles) foraging on short grass. Note speckled plumage on wings and back. Cape Kidnappers, Hawkes Bay, New Zealand, October.

Brent Stephenson / North Island Robin (Petroica longipes) feeding chicks at the nest. Note food items in bill. Tiritiri Matangi Island, Auckland, New Zealand, September.

Brent Stephenson / North Island Robin (Petroica longipes) feeding chicks at its nest. Note food items in its bill. Tiritiri Matangi Island, Auckland, New Zealand, September.

Brent Stephenson / Tui (Prosthemadera novaeseelandiae) perched. Note iridescent plumage. Tiritiri Matangi Island, Auckland, New Zealand, September.

Brent Stephenson / Tui (Prosthemadera novaeseelandiae) singing with bill wide open. Note iridescent plumage in the sunshine. Tiritiri Matangi Island, Auckland, New Zealand, September.

Simon Colmer / Honey bee (Apis mellifera) workers on comb with capped honey cells and pollen store cells, note the different colour pollen from different flowers, Sussex, UK

MYN / John Tiddy / Field studio set up for photographing Spider orchids for Meetyourneighbours.net project in tTypical box / ironbark bush habitat, very sparse and stony. A softbox used for backgrounds and a diffusion...

Alex Mustard / 2020VISION / Male Fifteen spined stickleback (Spinachia spinachia) building his nest, Note how a discarded orange piece of fishing line has been incorporated. Babbacombe Bay, Torbay, Devon, UK, April

Alex Mustard / 2020VISION / Diver collecting Queen scallop (Aequipecten / Chlamys opercularis). Note this shot was posed and the scallop was never actually touched. Loch Carron, Ross and Cromarty, Scotland, UK, April.

Alex Mustard / 2020VISION / Diver collecting Queen scallop (Aequipecten / Chlamys opercularis). Note this shot was posed and the scallop was never actually touched. Loch Carron, Ross and Cromarty, Scotland, UK, April.

Alex Mustard / 2020VISION / Three Jewel anemones (Corynactis viridis) photographed under blue light to show fluorescence, Plymouth Sound, Devon, UK, July. Note tiny amphipods living inside the central anemone.

Alex Mustard / 2020VISION / Mouth and tentacles of Jewel anemone (Corynactis viridis) photographed under blue light to show fluorescence, Plymouth Sound, Devon, UK, July, Note tiny amphipods living inside anemone. Did you know?...

LYNN M. STONE / American White pelican (Pelecanus erythrorhynchos), adult in breeding plumage (note hard knob on upper mandible, a characteristic feature of white pelicans only in the courtship and early breeding sea...

LYNN M. STONE / American White pelican (Pelecanus erythrorhynchos), adult in breeding plumage (note hard knob on upper mandible, a characteristic feature of white pelicans only in the courtship and early breeding sea...

LYNN M. STONE / American White pelican (Pelecanus erythrorhynchos) in flight, in breeding plumage (note characteristic horn on upper mandible, bright orange bill, and yellow pouch), Mississippi River, northern Illino...

LYNN M. STONE / American White pelican (Pelecanus erythrorhynchos), adult in breeding plumage (note hard knob on upper mandible, a characteristic feature of white pelicans only in the courtship and early breeding sea...

Gary K. Smith / Training Tomato (Solanum lycopersicum) plants, gardener fixing string to support greenhouse tomatoes in growbags, note plants in bottomless pots placed in growbag to increase root run. Norfolk, Englan...

Adrian Davies / Dog Lichen (Peltigera sp.) growing on oak bark. Note reddish spore producing apothecia. The Trossachs, Scotland, February.

Brent Stephenson / Adult Red-footed Booby (Sula sula) perched in the branches of mangroves showing the characteristic red feet of this species. Aldabra Atoll, Seychelles. Note the open bill, this bird is panting in orde...

Brent Stephenson / Campbell Albatross (Thalassarche impavida) in flight showing upperwing. Note the diagnostic pale eye of this species. Off North Cape, New Zealand, April.

John MacPherson / 2020VISION / People in dinghy watch a Bottlenose dolphin (Tursiops truncatus) breaching behind their boat, Moray Firth, Inverness-shire, Scotland, UK, July, Note: Severe crop - web use or small repro only