Bernard Castelein / Small white (Pieris rapae) butterfly resting on a leaf, Klein Schietveld Nature Reserve, Brasschaat, Belgium. July.

Bernard Castelein / Small white (Pieris rapae) butterfly resting on a leaf, Klein Schietveld Nature Reserve, Brasschaat, Belgium. July.

Bernard Castelein / Pied kingfisher (Ceryle rudis) perched on branch, Allahein river, The Gambia.

Bernard Castelein / Pied kingfisher (Ceryle rudis) perched on branch, holding a freshly caught fish in its beak, Allahein river, The Gambia.

Bernard Castelein / White-faced whistling duck (Actophilornis africanus) standing in shallow water, Allahein River, The Gambia.

Bernard Castelein / White-faced whistling duck (Actophilornis africanus) standing in shallow water, Allahein River, The Gambia.

Bernard Castelein / White-breasted cormorant (Phalacrocorax lucidus) in flight, with nesting material in beak, Bao Bolong Wetland Reserve, The Gambia.

Bernard Castelein / White-breasted cormorant (Phalacrocorax lucidus) taking flight from river, Bao Bolong Wetland Reserve, The Gambia.

Bernard Castelein / White-breasted cormorant (Phalacrocorax lucidus) in flight, carrying feather in beak, Bao Bolong Wetland Reserve, The Gambia.

Bernard Castelein / White-breasted cormorant (Phalacrocorax lucidus) flock, perched in treetop, Bao Bolong Wetland Reserve, The Gambia.

Bernard Castelein / White-breasted cormorant (Phalacrocorax lucidus) flock, perched in treetop, Bao Bolong Wetland Reserve, The Gambia.

Bernard Castelein / Great egret (Egretta alba) fishing in shallow water, Allahein River, The Gambia.

Bernard Castelein / Great egret (Egretta alba) fishing in shallow water, Allahein River, The Gambia.

Bernard Castelein / Great egret (Egretta alba) walking across mud in early morning sunlight, Allahein River, The Gambia.

Bernard Castelein / White-backed night heron (Gorsachius leuconotus) looking down from its perch on a branch, Allahein river, The Gambia.

Bernard Castelein / Black-crowned night heron (Nycticorax nycticorax) perched on a tree stump along the river, Allahein river, The Gambia.

Bernard Castelein / Black-crowned night heron (Nycticorax nycticorax) perched on a tree stump, flapping wings, Allahein river, The Gambia.

Bernard Castelein / Black-crowned night heron (Nycticorax nycticorax) perched on a branch with wings open, Allahein river, The Gambia.

Bernard Castelein / Black-crowned night heron (Nycticorax nycticorax) perched on a tree stump along the river, Allahein river, The Gambia.

Bernard Castelein / Black-crowned night heron (Nycticorax nycticorax) perched on a stump, preening, Allahein river, The Gambia.

Jack Dykinga / American white pelican (Pelecanus erythrorhynchos) swallowing a catch of fish, Gilbert Riparian Preserve, Arizona, USA.

Jack Dykinga / American white pelican (Pelecanus erythrorhynchos) taking flight from lake, Gilbert Riparian Preserve, Arizona, USA.

Jack Dykinga / American white pelican (Pelecanus erythrorhynchos) landing on lake. Gilbert Riparian Preserve, Arizona, USA.

Jack Dykinga / Four American white pelican (Pelecanus erythrorhynchos) standing in shallow water, preening, Gilbert Riparian Preserve, Arizona, USA.

Jack Dykinga / American white pelican (Pelecanus erythrorhynchos) standing in shallow water, Gilbert Riparian Preserve, Arizona, USA.

Bence Mate / Two Great white egret (Ardea alba) in winter, Kiskunsag National Park, Hungary. December.

Bence Mate / Grey heron (Ardea cinerea) and Great white egret (Ardea alba) standing facing each other at sunrise. Lake Csaj, Kiskunsagi National Park, Hungary. December.

Bence Mate / Black stork (Ciconia nigra), Great white egret (Ardea alba), Black crowned night heron (Nycticorax nycticorax), Grey heron (Ardea cinerea), European spoonbill (Platalea leucorodia) and Greylag geese (...

Georgette Douwma / RF - Composite image of blue tropical reef fish on a black background, Blue triggerfish (Pseudobalistes fuscus), Elonggate surgeonfish (Acanthurus mata), Yellowtail tang (Zebrasoma xanthurum), Neon da...

Georgette Douwma / RF - Tropical reef fish, composite image on a black background, Mimic surgeonfish (Acanthurus pyroferus), Elongate surgeonfish (Acanthurus mata), Redmouth triggerfish (Odonus niger), Black spotted por...

Georgette Douwma / RF - Tropical reef fish, composite image on black background, Radial filefish (Acreichthys radiatus), Devilfish (Inimicus didactylus), Black-spotted porcupinefish (Arothron hystrix), Puffer filefish...

Georgette Douwma / RF - Tropical reef fish, composite image on black background, Yellowbar angelfish (Pomacanthus maculosus), Square-spot anthias (Pseudanthias pleurotaenia), male and female, Seagrass filefish (Acreich...

Georgette Douwma / RF - Juvenile Antennata lionfish (Pterois antennata) on black background, Indo-Pacific. (This image may be licensed either as rights managed or royalty free.)

Georgette Douwma / Surgeonfish, composite image on black background, Yellowtail tang (Zebrasoma xanthurum), Powder-blue surgeonfish (Acanthurus leucosternon), Elongate surgeonfish (Acanthurus mata), Striped surgeonfish...

Georgette Douwma / Surgeonfish composite image on black background, Bluespine surgeonfish (Naso unicornis), Striped surgeonfish (Acanthurus lineatus), Sailffin tang (Zebrasoma veliferum) juvenile, Mimic surgeonfish (Aca...

Georgette Douwma / Tropical reef fish composite image on black background, Splendid soldierfish (Myripristis melanosticta), Pajama cardinalfish (Sphaeramia nematoptera), Golden puffer (Arothron meleagris), Banggai cardi...

Georgette Douwma / Tropical reef fish composite image on black background, Thornback cowfish (Lactoria fornasini), Longnose filefish (Oxymonacanthus longirostris), Blackbarred sandperch (Parapercis tetracantha), Lyretai...

Georgette Douwma / Blue tropical reef fish composite image on black background, Blue triggerfish (Pseudobalistes fuscus), Bicolour angelfish (Centropyge bicolor), Elongate surgeonfish (Acanthurus mata), Yellowtail tang...

Georgette Douwma / Yellow tropical reef fish composite image on black background, Falcula butterflyfish (Chaetodon falcula), Yellow boxfish (Ostracion cubicus), Golden butterflyfish (Chaetodon semilarvatus), Red Sea clo...

Georgette Douwma / Yellow tropical reef fish composite image on black background, Sailfin tang (Zebrasoma veliferum) juvenile, Pajama cardinalfish (Sphaeramia nematoptera), Three-spot angelfish (Apolemichthys trimaculat...

Georgette Douwma / Star pufferfish (Arothron stellatus) with two juveniles, composite image on black background, Indo-Pacific.

Georgette Douwma / Golden pufferfish (Arothron meleagris) with juvenile, composite image on black background, Indo-Pacific.

Georgette Douwma / Mixed Pufferfish, adults and juveniles, composite image on black background, 1. Star puffer (Arothron stellatus); 2. Black spotted porcupinefish (Arothron hystrix); 3. Star puffer (Arothron stellatu...

Georgette Douwma / Mixed Pufferfish, adult and juvenile, composite image on black background, 1. Black spotted porcupinefish (Arothron hystrix); 2. Blackspotted puffer (Arothron nigropunctatus); 3, 4. Star puffer (Aroth...

Georgette Douwma / Cuming's sea star (Neoferdina cumingi) on black background, Papua New Guinea, Indo-Pacific.

Georgette Douwma / Honeycomb / Cushion starfish (Pentaceraster alveolatus) on black background, Malapascua Island, Philippines, Indo-Pacific.

Emanuele Biggi / Gilding ant (Cephalotes atratus) portrait on white background, Iquitos, Peru.

Emanuele Biggi / Giant forest ant (Dinomyrmex gigas) portrait on white background, Borneo.

Doug Perrine / Oceanic whitetip shark (Carcharhinus longimanus) accompanied by Pilot fish (Naucrates ductor), and small Remora (Remora sp.) fish, Big Island, Hawaii, Pacific Ocean.

Barry Mansell / An usual variant of a female Regal jumping spider (Phidippus regius) close up, North Florida, USA. Controlled conditions.

Barry Mansell / Cardinal jumper (Phidippus cardinalis) spider on a leaf, Florida, USA. Controlled conditions.

Robert Thompson / Yellow-tail moth (Euproctis similis) on a leaf, Montiaghs Moss National Nature Reserve, County Antrim, Northern Ireland. July.

Robert Thompson / Hawthorn (Crataegus laevigata) flowers, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. May.

Robert Thompson / Green-veined white butterfly (Pieris napi) head detail, Tandragee, County Armagh, Northern Ireland. May.

Robert Thompson / Green-veined white butterfly (Pieris napi) resting on a flower, Tandragee, County Armagh, Northern Ireland. May.

Robert Thompson / Greater stitchwort (Stellaria holostea) stamen detail, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. April.

Robert Thompson / Greater stitchwort (Stellaria holostea) flower close up, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. April.

Robert Thompson / Greater stitchwort (Stellaria holostea) flowering, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. April.

Robert Thompson / Dandelion (Taraxacum officinale) seedhead with two remaining seeds, Brackagh Moss National Nature Reserve, County Armagh. April.

Robert Thompson / Cryptic wood white butterfly (Leptidea juvernica) nectaring on a flower, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. May.

Robert Thompson / Cryptic wood white (Leptidea juvernica) nectaring on a flower, Brackagh Moss National Nature Reserve, County Armagh, Northern Ireland. May.

Robert Thompson / Clustered toughshank mushroom (Gymnopus confluens) cluster, growing from forest floor, Gosford Forest Park, County Armagh, Northern Ireland. September.

Robert Thompson / Two Clouded magpie moth (Abraxas sylvata) resting on a fern frond, Gosford Forest Park, County Armagh, Northern Ireland. June.

Robin Chittenden / Smoky wainscot moth (Mythimna impura) resting on tree trunk, Norwich, UK. July.

Robin Chittenden / Guillemots (Uria aalge) huddled together on cliff face, Bempton Cliffs, Yorkshire, UK. June.

Robin Chittenden / Little egret (Egretta garzetta) preening its underwing, Strumpshaw Fen, Norfolk, UK. September.

Robin Chittenden / Box tree moth (Cydalima perspectalis) against white background, Norfolk, UK. June. Stacked and cutout.

Andy Trowbridge / Male Australian magpie (Gymnorhina tibicen) coming in to land in paddock, Canterbury, South Island, New Zealand.

Ernie Janes / Bogbean (Menyanthes trifoliata) flowering in garden pond, Norfolk, UK. May.

Ernie Janes / Cluster of Parasol mushroom (Macrolepiota procera) growing in grass, UK. September.

Ernie Janes / Cluster of Parasol mushroom (Macrolepiota procera) growing in grass, UK. September.

Ernie Janes / * Swarm of Crane fly (Tipulidae) resting on white wall and door, UK. October.

Ernie Janes / * Crane flies (Tipulidae) resting on white wall, UK. October.

Ernie Janes / Rainbow over Happisburgh Light House, Norfolk, UK. October, 2021.

Ernie Janes / Rainbow over Happisburgh Light House, Norfolk, UK. October, 2021.

Robin Chittenden / Common eider (Somateria mollissima) swimming and displaying in Amble harbour, Northumberland, England, UK. March.

Loic Poidevin / Little egret (Egretta garzetta) standing on clump of European samphire (Salicornia europaea), Vendee, France. November.

Nigel Cattlin / Common swift moth (Korscheltellus lupulina) caterpillar in soil, England, UK.

Nigel Cattlin / British Saanen (Capra hircus) goats being milked in a milking shed, Berkshire, England, UK.

Nigel Cattlin / Dandelion (Taraxacum officinale) seed head with some seeds removed to show structure with seeds and pappus.

Nigel Cattlin / Hairy bittercress (Cardamine hirsuta) weed, beginning to flower in a garden flowerbed, Berkshire, England, UK. February.

Joel Sartore / Photo Ark / Panther chameleon (Furcifer pardalis) walking out of frame, Lincoln Children's Zoo. Captive.

Joel Sartore / Photo Ark / Panther chameleon (Furcifer pardalis) walking in and out of frame, Lincoln Children's Zoo. Captive.

Joel Sartore / Photo Ark / Laotian langur (Trachypithecus laotum) turning to look at camera, while eating, Endangered Primate Rescue Center, Vietnam. Captive.

Joel Sartore / Photo Ark / Von der Decken's sifaka (Propithecus deckenii) turning to look at camera, Lemur Island, Madagascar. Critically Endangered. Captive.

Joel Sartore / Photo Ark / Panamanian night monkey (Aotus zonalis) turning to look at camera, El Nispero Zoo, Panama. Captive.

Joel Sartore / Photo Ark / African giant millipede (Archispirostreptus gigas) close up, walking out of frame, Lincoln Children's Zoo. Captive.

Joel Sartore / Photo Ark / Pink orchid mantis (Hymenopus coronatus) rocking back and forth while cleaning its self, Saint Louis Zoo. Captive.

Joel Sartore / Photo Ark / Brown rhinoceros beetle (Xylotrupes gideon) male stood moving mandibles, Saint Louis Zoo. Captive.

Joel Sartore / Photo Ark / Horned guan (Oreophasis derbianus) close up of head looking around, Saint Louis Zoo. Endangered. Captive.

Joel Sartore / Photo Ark / Edward's pheasant (Lophura edwardsi) close up male and female looking at camera, Pheasant Heaven. Critically Endangered. Captive.

Joel Sartore / Photo Ark / Orange-fronted fruit dove (Ptilinopus aurantiifrons) close up of head looking around, Plzen Zoo. Captive.

Joel Sartore / Photo Ark / Baer's pochard (Aythya baeri) preening feathers, Plzen Zoo. Critically endangered species. Captive.

Joel Sartore / Photo Ark / Madagascar pochard (Aythya innotata) male and female looking around and towards camera, Pochard Breeding Center, Madagascar. Critically Endangered. Captive.

Joel Sartore / Photo Ark / Painted stork (Mycteria leucocephala) snapping towards the camera, Tracy Aviary. Captive.

Joel Sartore / Photo Ark / Puerto Rican crested toad (Peltophryne lemur) turning in a circle, then walks off, Omaha Zoo. Captive