Yukihiro Fukuda / Feral domestic rabbit (Oryctolagus cuniculus) standing on hind legs on coast, Okunojima Island, also known as Rabbit Island, Hiroshima, Japan.

Mateusz Piesiak / Black-headed Gull (Chroicocephalus ridibundus) flock in flight a dawn, Barycz Valley Landscape Park, Poland. Emotion'Ailes Photography Competition 2021 Category Winner - Artistic.

Andy Murch / Scoophead shark (Sphyrna media), released specimen. Isla Chepillo, Rio Bayano, Panama.

Andy Murch / Little gulper shark (Centrophorus uyato). Cape Eleuthera, Bahamas.

Guy Edwardes / Waxwing (Bombycilla garrulus) feeding on berries, perched on branch. Finland. February.

Clay Bolt / Blue-banded bee (Amegilla sp) males sleeping on stem. Halmahera, North Maluku, Indonesia.

Nick Hawkins / Silky shark (Carcharhinus falciformis). Cocos Island National Park, Costa Rica.

Daniel Heuclin / Vicuna (Vicugna vicugna), five running across salt flat with mountain in background. Salar de Ascotan, Chile. September 2018.

Tui De Roy / Flightless cormorant (Phalacrocorax harrisi), two on rock. Bird drying wings in foreground with other sitting on nest in background. Cape Douglas, Fernandina Island, Galapagos.

David Fleetham / Day / Big blue octopus (Octopus cyanea) with diver in background. Hawaii. September 2012.

Tony Wu / Blue whale (Balaenoptera musculus indica) in Indian Ocean, Mirissa, Matara, Sri Lanka.

Tony Wu / Asian sheepshead wrasse (Semicossyphus reticulatus), male in white breeding colouration. Niigata Prefecture, Honshu, Japan. June.

Guy Edwardes / Bluebell (Hyacinthoides non-scripta) covered slope with Colmer's Hill in background, Eype Down, Bridport, Dorset, England, UK. May 2014.

Theo Bosboom / Common blue damselflies (Enallagma cyathigerum) group gathering over water, Hondenven, Tubbergen, Netherlands, July.

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) head on just below surface, another in background, off the West Coast of Auckland, New Zealand, February

Loic Poidevin / Common crane (Grus grus) group of three in flight, Lake Hornborga, Sweden , April

Alex Hyde / RF - Close up of feathers of a Scarlet Macaw (Ara macao) Osa Peninsula, Costa Rica. (This image may be licensed either as rights managed or royalty free.)

Tony Wu / Pygmy blue whale (Balaenoptera musculus brevicauda) diving with pelagic fish (likely yellowfin tuna or similar open ocean predatory species) visible in the background, Sri Lanka, Indian Ocean.

Georgette Douwma / Upside down jellyfish (Cassiopeia andromeda) Lembeh, Sulawesi, Indonesia.

Wim van den Heever / Blue wildebeest (Connochaetes taurinus) herd silhouetted against the rising sun with clouds in the background. Greater Kruger National Park, South Africa

Wim van den Heever / Blue sheep (Pseudois nayaur) Hemis National Park, Jammu and Kashmir, India.

Gerrit Vyn / Pair of adult Trumpeter Swans (Cygnus buccinator) in flight. Skagit County, Washington. January.

Claudio Contreras / Firewheel (Gaillardia pulchella) flowers at twilight, Laredo Borderlands, Texas, USA. April

Franco Banfi / Schooling Scalloped hammerhead sharks (Sphyrna lewini) Cocos Island National Park, Costa Rica.

Mark Taylor / Blue British Shorthair kitten sitting.

MYN / JP Lawrence / Blue poison dart frog (Dendrobates tinctorius azureus) portrait, captive. Meetyourneighbours.net project

MYN / JP Lawrence / Strawberry poison frog (Oophaga pumilio) Escudo de Veraguas, Panama. Meetyourneighbours.net project

MYN / JP Lawrence / Dyeing poison frog (Dendrobates tinctorius) captive, occurs in Guiana, Suriname, Brazil, and French Guiana. Meetyourneighbours.net project

MYN / JP Lawrence / Dyeing poison frog (Dendrobates tinctorius) captive, occurs in Guiana, Suriname, Brazil, and French Guiana. Meetyourneighbours.net project

Wim van den Heever / Cape gannet (Morus capensis) diving for fish during annual sardine run, Port St Johns, South Africa. June.

Wim van den Heever / Red-and-green macaw (Ara chloropterus) in flight, Pantanal, Brazil. August.

Alex Mustard / Harlequin sweetlips (Plectorhinchus chaetodonoides) cleaned by a pair of bluestreak cleaner wrasse (Labroides dimidiatus). South Atoll, Tubbataha Atolls, Tubbataha Reefs Natural Park, Palawan, Philipp...

Alex Mustard / Black hamlet (Hypoplectrus nigricans) and Yellowbelly hamlet (Hypoplectrus aberrans) spawning at dusk. As this genus is quite recently evolved hybridization is still possible. Hamlets are one of the...

Bence Mate / White-tailed Eagle (Haliaeetus albicilla) flying, with Great egret (Ardea alba) in the foreground, Lake Csaj, Pusztaszer, Hungary. February. Winner of the Portfolio category of the Terre Sauvage Natur...

Staffan Widstrand / Raven (Corvus corax) mobbing Gyrfalcon (Falco rusticolus), Hornoya Island, Varanger Peninsula, Norway, March.

Sven Zacek / Hepatica (Hepatica nobilis) white morph and normal blue morph, Southern Estonia, April.

Juan Carlos Munoz / Lavender (Lavandula angustifolia) fields, Valensole Plateau, Alpes Haute Provence, France, June.

Marie Read / Tufted puffin (Fratercula cirrhata), close-up portrait, St. Paul Island, Pribilofs, Alaska, USA, July.

Jordi Chias / Atolla jellyfish (Atolla wyvillei) with Gentoo penguin (Pygoscelis papua) in the background near the surface. Antarctic Peninsula. Finalist in the Underwater category of the Wildlife Photographer of t...

Dave Watts / Hermit ibis (Geronticus eremita) flock in flight, Morocco. Critically endangered.

Sven Zacek / White-tailed sea eagle (Haliaeetus albicilla) in flight, against a clear blue sky, Norway, July.

Sven Zacek / White-tailed sea eagle (Haliaeetus albicilla) flying, against a clear blue sky, Norway, July.

Charlie Summers / Adelie Penguin (Pygoscelis adeliae) carrying stolen rock from another nest in rookery, Peterman Island, Antarctica, November.

Solvin Zankl / By-the-wind sailor (Velella velella) colony. Sargasso Sea, Bermuda.

Nick Upton / Adult Herring gull (Larus argentatus) walking among sunbathers on beach, St.Ives, Cornwall, UK, June. Editorial use only.