Wild Wonders of Europe / Sá / Mediterranean Monk seal (Monachus monachus) pair mating, Deserta Grande, Desertas Islands, Madeira, Portugal, August 2009, Critically endangered species

Wild Wonders of Europe / Sá / Mediterranean Monk seal (Monachus monachus) pair mating, Deserta Grande, Desertas Islands, Madeira, Portugal, August 2009, Critically endangered species

Wild Wonders of Europe / Sá / Mediterranean Monk seal (Monachus monachus) pair courting on rocks on seabed, Deserta Grande, Desertas Islands, Madeira, Portugal, August 2009, Critically endangered species

Wild Wonders of Europe / Sá / Mediterranean Monk seal (Monachus monachus) pair mating, Deserta Grande, Desertas Islands, Madeira, Portugal, August 2009, Critically endangered species

Wild Wonders of Europe / Bartocha / Common red soldier beetle (Rhagonycha fulva) pair mating on Wild carrot (Daucus carota carota) flower, Hvblege, Mn, Denmark, July 2009

Wild Wonders of Europe / Zupanc / Alpine grasshopper (Miramella alpina) pair mating on a thistle, Triglav National Park, Slovenia, August 2009

Wild Wonders of Europe / Zupanc / Alpine grasshopper (Miramella alpina) pair mating on a thistle, Triglav National Park, Slovenia, August 2009. WWE OUTDOOR EXHIBITION.

Wild Wonders of Europe / Roggo / European grayling (Thymallus thymallus) pair spawning, male on the left, Lake of Thun, Thun, Switzerland, March 2009

Wild Wonders of Europe / Zupanc / Alpine grasshopper (Miramella alpina) pair mating on a thistle, Triglav National Park, Slovenia, August 2009

Wild Wonders of Europe / Zupanc / Alpine grasshopper (Miramella alpina) pair mating on a thistle, Triglav National Park, Slovenia, August 2009

Andy Rouse / Osprey (Pandion haliaetus) pair mating on nest, UK, Europe

Ross Hoddinott / Blue-tailed damselfly {Ischnura elegans} mating pair, Cornwall, UK. June

John Cancalosi / Grey tree frog (Hyla versicolor) calling to attract mate, New York, USA

Roger Powell / Black Guillemot {Cepphus grylle} with Sandeel fish in beak trying to entice a female to his nest site, Caithness, Scotland, UK

John Cancalosi / American toad (Bufo americanus) male calling to attract female, New York, USA

John Cancalosi / American toad (Bufo americanus) male calling to attract female, New York, USA

Wild Wonders of Europe / Presti / Red footed falcon (Falco vespertinus) pair mating, Danube Delta, Romania, May 2009

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

Wild Wonders of Europe / Smit / Balkan fritillary butterflies (Boloria graeca) mating, Djerdap National Park, Serbia, June 2009

Wild Wonders of Europe / Allofs / Greater flamingos (Phoenicopterus roseus) mating, in lagoon, Pont Du Gau, Camargue, France, April 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 / 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 / Pair of Common hermit crabs (Pagurus bernhardus) male carrying female until she leaves her shell and they can mate, Trondheimsfjorden, Norway, February 2009

Tim Laman / Magnificent Bird of Paradise (Cicinnurus magnificus) male calling on calling perch near his display court, Huon Peninsula, YUS Conservation Area, Morobe Province, Papua New Guinea. Near-threatened

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

Tim Laman / Adult male Twelve-wired Bird of Paradise (Seleucidis melanoleuca) on his display pole in the swamp forest along the Karawari River, East Sepik Province, Papua New Guinea.

Tim Laman / Magnificent Bird of Paradise (Cicinnurus magnificus) male erecting his cape in display on calling perch near his display court, Huon Peninsula, YUS Conservation Area, Morobe Province, Papua New Guinea...

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

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 King Bird of Paradise (Cicinnurus regius) on his display vine in the rainforest canopy, in the vicinity of the Karawari River, East Sepik Province, Papua New Guinea.

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.

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

Tim Laman / Male Victoria's Riflebird (Ptiloris victoriae) bird of paradise perched, calling on display perch. Atherton Tablelands, Wooroonooran National Park, Queensland, Australia.

Tim Laman / Male Carola's Parotia (Parotia carolae) bird of paradise displaying at his display court, Crater Mountain Wildlife Management Area, Eastern Highlands Province, Papua New Guinea.

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

Wild Wonders of Europe / Geslin / Grey seal (Halichoerus grypus) courtship, Donna Nook, Lincolnshire, UK, November 2008

Wild Wonders of Europe / Geslin / Grey seal (Halichoerus grypus) mating behaviour, male pinning down female, Donna Nook, Lincolnshire, UK, November 2008

Wild Wonders of Europe / Geslin / Grey seal (Halichoerus grypus) pair, Donna Nook, Lincolnshire, UK, November 2008

Wild Wonders of Europe / Geslin / Grey seal (Halichoerus grypus) mating behaviour in shallow water, Donna Nook, Lincolnshire, UK, November 2008

Wild Wonders of Europe / Geslin / Grey seal (Halichoerus grypus) mating behaviour, Donna Nook, Lincolnshire, UK, November 2008

Wild Wonders of Europe / Schandy / European green toad (Bufo viridis) calling, vocal sac inflated, in a pond (at 2,711m) Adylsu valley, side valley to Baksan valley and Elbrus, Caucasus, Russia, June 2008

Wild Wonders of Europe / Schandy / European green toad (Bufo viridis) calling, vocal sac inflated, with eyes closed, in a pond (at 2,711m) Adylsu valley, side valley to Baksan valley and Elbrus, Caucasus, Russia, June 2008

Wild Wonders of Europe / Schandy / Lycaenid butterflies mating, Mount Cheget, Caucasus, Russia, June 2008

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

Andy Rouse / Red deer (Cervus elaphus) stag calling to hinds during rut, Scottish Highlands, UK

Orsolya Haarberg / Northern gannet (Morus bassanus) colony, courtship, Seabird cliff, Langanes peninsula, Iceland, July 2008

Andy Rouse / European brown hare (Lepus europaeus) female boxing male during courtship, UK (non-ex)

Andy Rouse / King penguin (Aptenodytes patagonicus) males displaying in colony, Falkland Islands (non-ex)

Andy Rouse / European brown hare (Lepus europaeus) males and female during courtship, UK (non-ex)

Wild Wonders of Europe / Nill / Red-backed shrike (Lanius collurio) pair, male feeding insect to female in courtship, Bulgaria, May 2008

Wild Wonders of Europe / Varesvuo / European Roller (Coracias garrulus) courtship display, Pusztaszer, Hungary, May 2008. WWE BOOK. WWE INDOOR EXHIBITION. Magic Moments book plate.

Wild Wonders of Europe / Nill / Common roller (Coracias garrulus) female feeding on its courtship gift, Bulgaria, May 2008

Wild Wonders of Europe / Varesvuo / Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / Red-footed falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / European Roller (Coracias garrulus) pair with courtship gift of insect prey, Pusztaszer, Hungary, May 2008

Wild Wonders of Europe / Nill / European bee-eater (Merops apiaster) pair in courtship display, Bulgaria, May 2008

Wild Wonders of Europe / Varesvuo / Red-footed Falcon (Falco vespertinus) rear view of male (left) passing prey to female, Hortobagy NP, Hungary

Wild Wonders of Europe / Varesvuo / Red-footed Falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / European Bee-eater (Merops apiaster) pair, male passing Dragonfly prey to female, Pusztaszer, Hungary, May 2008

Wild Wonders of Europe / Varesvuo / Red-footed Falcon (Falco vespertinus) mating pair, Hortobagy NP, Hungary

Wild Wonders of Europe / E Haarberg / Chamois (Rupicapra rupicapra) male calling during rut, Gran Paradiso National Park, Italy, November 2008

Wild Wonders of Europe / E Haarberg / Chamois (Rupicapra rupicapra) male marking his territory in rutting season, Gran Paradiso National Park, Italy, November 2008

Wild Wonders of Europe / E Haarberg / Chamois (Rupicapra rupicapra) male with erect penis in rutting season, Gran Paradiso National Park, Italy, November 2008

Wild Wonders of Europe / E Haarberg / Chamois (Rupicapra rupicapra) male vocalising in rut, Gran Paradiso National Park, Italy, November 2008

Pete Oxford / Waved Albatross (Phoebastria irrorata) courtship, Punta Cevallos, Espaola Island, Galapagos Islands, Ecuador, South America. Endemic, Critically endangered

Pete Oxford / Waved Albatross (Phoebastria irrorata) courtship, Punta Cevallos, Española Island, Galapagos Islands, Ecuador, South America. Endemic, Critically endangered

Solvin Zankl / Moor frog (Rana arvalis) mating pair in pond, Germany

Kerstin Hinze / Japanese / Red-crowned crane (Grus japonensis) pair displaying, calling, in snow, Tsurui, Kushiro-Shitsugen National Park, Hokkaido, Japan

Jorma Luhta / Common cranes {Grus grus} pair displaying, Northern Finland, September

Yukihiro Fukuda / Japanese macaque / Snow monkey {Macaca fuscata} male grooming female in courtship in Japanese green alder tree {Alnus firma}, autumn, Jigokudani, Nagano, Japan

Jane Burton / Siamese fighting fish {Betta splendens} two males in lateral display, captive, freshwater, from Malaysia and Thailand

Igor Shpilenok / Kamchatka brown bear (Ursus arctos beringianus) male sniffing the tracks of a female in snow, Kronotsky Zapovednik, Kamchatka, Far East Russia

Edwin Giesbers / Masked tree / Puddle frogs (Smilisca phaeota) pair, Costa Rica

Edwin Giesbers / Glass-wing Butterflies mating {Greta oto} Costa Rica

Jose B. Ruiz / European bee eaters (Merops apiaster) mating on branch. Seville, Spain

Patrick Morris / Magnificent frigate bird {Frigata magnificens} pair on nest, male displaying with red throat pouch inflated, Genovesa Is, Galapagos

Dietmar Nill / Moor frogs (Rana arvalis) mating in a pond, Germany (the male is blue)

Georgette Douwma / Pharao cuttlefish (Sepia pharaonis), very small male guarding large egg-laying female. Andaman Sea, Thailand.

Carol Walker / Pair of King Penguins (Aptenodytes patagonicus) on Gold Beach, South Georgia Island, Sub Antarctica.

David Kjaer / Common Kingfisher (Alcedo atthis) pair mating, Buckinghamshire, England

Martin Dohrn / Red forms of Black slug {Arion ater} mating, Northern Italy, Europe

Rolf Nussbaumer / Queen butterfly {Danaus gilippus} pair mating on Golden Crownbeard flower (Verbesina encelioides) Rio Grande Valley, Texas, USA

Rolf Nussbaumer / Elk / Wapiti {Cervus canadensis} bull bugling beside cow amongst aspen trees, Rocky Mountain National Park, Colorado, USA, September 2006

Jose B. Ruiz / Male Great bustard {Otis tarda} displaying plumage, Castuera, La Serena, Badajoz, Extremadura, Spain April 2007

Andy Sands / Common european toad (Bufo Bufo) Pair in amplexus in pond, Hertfordshire, UK, March

Andy Sands / Common frogs (Rana temporaria) Pair in amplexus among frogspawn, Captive, UK, March

Andy Sands / Common frogs (Rana temporaria) Pair in amplexus among frogspawn, Captive, UK, March

Pete Oxford / Great frigatebird (Fregata minor) male displaying, pouch inflated, Galapagos

Pete Oxford / Waved albatross (Phoebastria irrorata) pair in courtship display, Española / Hood Island, Galapagos

Mitsuaki Iwago / African Lion (Panthera leo) mating pair quarreling, Serengeti National Park, Tanzania

Pete Oxford / Green-eared chameleons (Calumma malthe) hanging upside down mating, larger male on right, rainforest, MADAGASCAR, endemic

Nature Production / Moray Eels {Gymnothorax kidako} courtship display, Kochi, Japan

Georgette Douwma / Pharaoh cuttlefish {Sepia pharaonis} male guarding egg laying female, Andaman Sea, Thailand