David Pike / Japanese crane courtship display {Grus japonensis} Hokkaido Japan Feb/March

Lynn M Stone / Bighorn sheep {Ovis canadensis} Female seeking refuge from male Jasper NP Alberta Canada

Pete Oxford / Male Galapagos Flightless cormorant offering seaweed to female {Nannopterum harrisi}

Theo Bosboom / Large group of Common blue damselflies (Enallagma cyathigerum) including mating couples - on stems of grass, Hondenven, Tubbergen, The Netherlands. June.

Enrique Lopez-Tapia / Man and veiled woman taking a photograph of the River Ganges at sunset, Rajshahi. Bangladesh June 2012. No release available.

Lynn M Stone / Great Egrets (Ardea alba) preening their breeding plumage, at nest. Osceola County, Florida, USA, March.

Alex Mustard / Rock beauty angelfish (Holacanthus tricolor) pair at dusk performing their courtship dance with the larger male circling the female, Georgetown, Grand Cayman, Cayman Islands, British West Indies. Cari...

Nick Turner / A couple relaxing amongst bluebells (Hyacinthoides non-scripta) in springtime woodland, Upper Soudley, Forest of Dean, Gloucestershire, May.

Nick Turner / A couple relaxing amongst bluebells (Hyacinthoides non-scripta) in springtime woodland, Upper Soudley, Forest of Dean, Gloucestershire, May.

Daniel Heuclin / Pyrenean mountain newt / brook salamander (Calotriton / Euproctus asper) mating pair, captive, from Pyreneen mountains, France and Spain, near threatened

Peter Cairns / 2020VISION / Pair of Gannets (Morus bassanus) mutual preening, Bass Rock, Firth of Forth, Scotland, UK, June. Photographer quote: 'I never get tired of watching gannets. This pair who momentarily lined up in perfe...

Ben Hall / 2020VISION / Two couples walking down path through woodland, The National Forest, Central England, UK, November 2010

Onne van der Wal / Couple in the cockpit of classic wooden power boat, Northeast Harbor, Maine, USA, September 2010. All non-editorial uses must be cleared individually.

Juan Carlos Munoz / Pair of Rockhopper penguins (Eudyptes chrysocome) with egg, with a group of penguins in the background. Penguin Island, Puerto Deseado, Patagonia, Argentina, Nov 2008

Charlie Summers / King / Imperial Cormorants (Phalacrocorax albiventer) breeding pair display courtship behaviour in the form of a ritual dance at their nesting site on Saunders Island, Falkland Islands

Wild Wonders of Europe / Hermansen / Gannets (Morus bassanus) pair, Saltee Islands, County Wexford, Ireland, June 2009

Wild Wonders of Europe / Hermansen / Gannet (Morus bassanus) courtship, Saltee Islands, County Wexford, Ireland, June 2009

Wild Wonders of Europe / Hermansen / Gannet (Morus bassanus) courtship, Saltee Islands, County Wexford, Ireland, June 2009

Wild Wonders of Europe / Green / Northern gannets (Morus bassanus) pair at nest, Saltee Islands, Ireland, June 2009

Wild Wonders of Europe / Green / Northern gannets (Morus bassanus) displaying, Saltee Islands, Ireland, May 2008

Angelo Gandolfi / Birdwatchers observing White Storks (Ciconia ciconia) in flight over the Strait of Gibraltar. Mirador El Estrecho, Andalusia, Spain, 2007.

Wild Wonders of Europe / Möllers / Nine-spotted moth (Amata / Syntomis phegea) pair mating, San Marino, May 2009

Wild Wonders of Europe / Allofs / White stork (Ciconia Ciconia) landing on nest with building material, Pont du Gau, Camargue, France, May 2009

Wild Wonders of Europe / Allofs / Greater flamingo (Phoenicopterus roseus) pair mating, in lagoon, Pont Du Gau, Camargue, France, April 2009

Wild Wonders of Europe / Allofs / Greater flamingos (Phoenicopterus roseus) mating, in lagoon, Pont Du Gau, Camargue, France, April 2009

Wild Wonders of Europe / Widstra / White storks (Ciconia ciconia) at nest, on large granite boulder, Los Barruecos Natural Monument, Caceres, Extremadura, Spain, April 2009 WWE OUTDOOR EXHIBITION.

Wild Wonders of Europe / Widstra / Hoopoe (Upupa epops) male feeding female in courtship display, La Serena, Extremadura, Spain, April 2009

Wild Wonders of Europe / Widstra / White stork (Ciconia ciconia) pair displaying, La Serena, Extremadura, Spain, March 2009

Wild Wonders of Europe / Munier / Reindeer (Rangifer tarandus) pair, Forollhogna National Park, Norway, September 2008

Wild Wonders of Europe / Widstra / Male Spanish ibex (Capra pyrenaica) scenting air behind female with tongue, Sierra de Gredos, Spain, November 2008

Wild Wonders of Europe / Widstra / Male Spanish ibex (Capra pyrenaica) scenting air behind female with tongue, Sierra de Gredos, Spain, November 2008 WWE OUTDOOR EXHIBITION

Wild Wonders of Europe / Lundgren / Northern stone crab (Lithodes maja) pair, Trondheimsfjorden, Norway, February 2009

Wild Wonders of Europe / Lundgren / Pair of Common hermit crabs (Pagurus bernhardus) male carrying female until she leaves her shell and they can mate, Trondheimsfjorden, Norway, February 2009

Alan Williams / Grey heron (Ardea cinerea) pair at nest, lower bird adding twig to nest, Midlands, UK, February

Anup Shah / Gelada baboon (Theropithecus gelada) pair sitting on cliff edge, Simien Mountains National Park, Ethiopia, November

Anup Shah / Walia ibex (Capra walie) pair resting, Simien Mountains National Park, Ethiopia, November, endangered species

Wild Wonders of Europe / Möllers / Common / Great cormorant (Phalacrocorax carbo sinensis) pair on nest, Oosterdijk, Enkhuizen, Ijsselmeer, Netherlands, March 2009

John Waters / Mute swan (Cygnus olor) courtship, Somerset, UK, Spring 2009

Guy Edwardes / Northern gannets {Morus bassanus} pair in courtship display, Great Saltee, Co. Wexford, Ireland, June

Tim Laman / Male Carola's Parotia (Parotia carolae) bird of paradise displaying on his display court to five females perched above, Crater Mountain Wildlife Management Area, Eastern Highlands Province, Papua New...

Tim Laman / Male Carola's Parotia (Parotia carolae) bird of paradise displaying on his display court to five females perched above, Crater Mountain Wildlife Management Area, Eastern Highlands Province, Papua New...

Tim Laman / Female and young male Ribbon-tailed Astrapia (Astrapia mayeri) bird of paradise on Schefflera fruits, Southwestern slopes of Mt. Hage, Enga Province, Papua New Guinea.

Tim Laman / Magnificent Bird of Paradise (Cicinnurus magnificus) male displaying to female at lek, Arfak Mountains, Papua, Indonesia.

Tim Laman / Magnificent Bird of Paradise (Cicinnurus magnificus) male displaying to female at lek display site, Arfak Mountains, Papua, Indonesia.

Tim Laman / Wilson's Bird of Paradise (Cicinnurus respublica) male and two females in display court, Batanta Island, Papua, Indonesia. Near-threatened.

Tim Laman / Goldie's Bird of Paradise (Paradisaea decora) male displaying to female at lek, Fergusson Island, Milne Bay Province, Papua New Guinea. Near-threatened.

Aflo / Black footed albatross (Phoebastria nigripes) pair displaying, Midway Islands, USA

Andy Rouse / Snow leopard (Panthera uncia) pair in high alpine habitat, captive, USA (non-ex)