1172-2348 - Indian Peafowl, (Pavo cristatus), albino, adult male courtship, Cuddly Creek, South Australia, Australia

1112-3235 - Adult broadclub cuttlefish (Sepia latimanus) courtship display, Sebayur Island, Flores Sea, Indonesia, Southeast Asia, Asia

1205-9 - Black grouse (Lyrurus tetrix), lekking, Cairngorms, Scotland, United Kingdom, Europe

1174-4030 - A couple in a historic city, looking at a smart phone, France

1174-4031 - A man holding a smart phone taking a selfy of himself and his girlfriend in front of Notre Dame cathedral, France

1174-4038 - A couple seated side by side taking a selfy with the Eiffel Tower in the background, France

1174-4042 - A couple, man and woman sitting close together on a bench by the River Seine, France

1174-4033 - A couple close together facing each other, embracing in a city at night, France

1174-4039 - A couple seated facing each other on a wall in the city of Paris with the Eiffel Tower in the background, France

1174-4032 - Two people, a couple standing close together taking a selfy outside the historic Notre Dame cathedral in Paris, France

1174-4027 - A couple using a street map beside an information sign under a metro sign in a city, France

1174-4043 - A couple walking along a narrow street in a historic city centre, with shopping bags, France

1174-4044 - A couple walking along a narrow city street with shopping bags, France

1174-4036 - A couple, man and woman riding traditional gallopers on a carousel ride in the shadow of the Eiffel Tower in Paris, France

1174-4025 - A couple sitting in seats at a pavement cafe in a city, France

1174-4041 - A couple, man and woman sitting on the parapet of a bridge over the River Seine, France

1174-4028 - A couple in the courtyard of the Louvre museum, by the large glass pyramid. Fountains and water, France

1174-4029 - A couple in the courtyard of the Louvre museum, by the large glass pyramid. Water jets and shallow pool, France

1174-4026 - A couple sitting in seats at a pavement cafe in a city, France

1174-4034 - A couple embracing and kissing in a city at night, France

1112-3022 - King penguins (Aptenodytes patagonicus) courtship display on the beach at Gold Harbour, South Georgia, Polar Regions

1179-233 - The male frigate with red throat pouch, which it inflates as part of its courtship behaviour, Barbuda, Antigua and Barbuda, Leeward Islands, West Indies, Caribbean, Central America

860-285858 - European bee-eater courtship on branch -Loire Valley France

465-3368 - Mating display by pair of Wire-net filefish (Cantherhines paradalis), Queensland, Australia, Pacific

832-370975 - Farmland Green Tree Frog (Rhacophorus arvalis), inflated vocal sac, courtship display, species endemic to Taiwan, Asia

832-372946 - Natterjack toad (Bufo calamita), male calling, Thuringia, Germany, Europe

832-374888 - King penguins (Aptenodytes patagonicus), St. Andrews Bay, South Georgia, sub-Antarctic and Antarctic

832-372948 - Natterjack toad (Bufo calamita), male calling, Thuringia, Germany, Europe

832-374474 - Kori Bustard (Ardeotis kori), male, in courtship display in Ndutu, Ngorongoro, Tanzania, Africa

832-370977 - Farmland Green Tree Frog (Rhacophorus arvalis), inflated vocal sac, courtship display, species endemic to Taiwan

832-367792 - Great Egret or Great White Egret (Casmerodius albus, Egretta alba), displaying on the nest, Florida, USA

832-374891 - King penguins (Aptenodytes patagonicus), pair in courtship, Gold Harbour, South Georgia, Antarctica

832-370976 - Farmland Green Tree Frog (Rhacophorus arvalis), inflated vocal sac, courtship display, species endemic to Taiwan, Asia

832-372947 - Natterjack toad (Bufo calamita), male calling, Thuringia, Germany, Europe

1167-402 - Pair of Patagonian crested ducks (Lophonetta specularioides) in courtship behaviour, the Neck, Saunders Island, Falkland Islands, South America

1167-368 - Rockhopper penguin (Eudyptes chrysocome) courtship behaviour, Rockhopper Point, Sea Lion Island, Falkland Islands, South America

832-325731 - Northern gannet (Sula bassana), courtship

832-325733 - Northern gannet (Sula bassana), courtship

832-366269 - Guinness advertise , Dublin , Ireland , Europe

1112-1278 - Australasian gannet (Morus serrator) courtship display at Cape Kidnappers, North Island, New Zealand, Pacific

1112-1276 - Australasian gannet (Morus serrator) courtship display at Cape Kidnappers, North Island, New Zealand, Pacific

1112-1277 - Australasian gannet (Morus serrator) courtship display at Cape Kidnappers, North Island, New Zealand, Pacific

1112-1274 - Australasian gannet (Morus serrator) courtship display at Cape Kidnappers, North Island, New Zealand, Pacific

1113-94010 - King Penguins, Aptenodytes patagonicus, pair courting, South Georgia, Antarctica

832-269969 - Fighting Pheasants (Phasianus colchicus) on a cornfield during mating time

832-269968 - Common Pheasants (Phasianus colchicus) on a cornfield during mating time

869-2206 - Northern gannet or booby courtship display of Northern gannet sitting on rock Animals Helgoland North Sea Germany

869-2207 - Northern gannet or booby courtship display of Northern gannet sitting on rock Animals Helgoland North Sea Germany

869-2224 - Northern gannet or booby courtship display of Northern gannet sitting on rock Animals Helgoland North Sea Germany

1112-1028 - Adult gentoo penguins (Pygoscelis papua) courtship display, Neko Harbor, Antarctica, Southern Ocean, Polar Regions

1112-1029 - Adult gentoo penguins (Pygoscelis papua) courtship display, Neko Harbor, Antarctica, Southern Ocean, Polar Regions

1112-1027 - Adult gentoo penguins (Pygoscelis papua) courtship display, Neko Harbor, Antarctica, Southern Ocean, Polar Regions

805-607 - Young Batak woman performing courtship dance, bowl of water and leaves symbolising commitment, Huta Bolon, Simanindo, Sumatra, Indonesia, Southeast Asia, Asia

1112-126 - Waved albatross (Diomedea irrorata) courtship display, Espanola Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

1112-127 - Waved albatross (Diomedea irrorata) courtship display, Espanola Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

832-19191 - Moor frog (Rana arvalis)

832-19192 - Moor frog (Rana arvalis)

832-19193 - Moor frog (Rana arvalis)

832-32611 - Moor frog

1198-376 - Ruff (philomachus pugnax) male displaying at lek, in breeding plumage, varanger, norway

1198-163 - Ruff (philomachus pugnax) male displaying at lek, in breeding plumage, varanger, norway

1198-651 - Nyala (tragelaphus angasi) male and female together, male in courtship display, eastern cape, south africa

1198-476 - Black-browed albatross (diomedea melanophris) falkland islands, pair in courtship display.

1198-406 - Magnificent frigatebird (fregata magnificens) in flight with inflated gular pouch, galapagos islands, ecuador

1198-258 - Magnificent frigatebird (fregata magnificens) in flight with inflated gular pouch, galapagos islands, ecuador

1190-366 - White stork, ciconia ciconia, couple standing in its nest, courtship, spring, oetwil am see, zuerich, switzerland

1190-371 - White stork, stork, ciconia ciconia, couple standing in its nest, courtship, spring, oetwil am see, zuerich, switzerland

1198-392 - Ruff (philomachus pugnax) male displaying at lek, in breeding plumage, varanger, norway

1190-365 - White stork, stork, ciconia ciconia, weissstorch, storch, couple standing in its nest, courtship, spring, oetwil am see, zuerich, switzerland

1198-566 - Ruff (philomachus pugnax) males displaying at lek, in breeding plumage, varanger, norway

1198-329 - Black-browed albatross (diomedea melanophris) falkland islands, pair in courtship display.

947-49 - Aerial view of Northern right whales (Balaena glacialis glacialis) in courtship. Gulf of Maine, USA. (rr)

1060-15 - Humpback male and female adults courting above the shallow reef, Vava'u Tonga, South Pacific

1060-11 - Two adult Humpback whales courting, Vava'u Tonga in the South Pacific

908-187 - Cuttlefish (Sepia officinalis) Courtship. Babbacombe, Torquay, South Devon, UK (RR)

908-174 - Cuttlefish (Sepia officinalis) Mating/Courtship. Babbacombe, Torquay, South Devon, UK (RR)

908-182 - Cuttlefish (Sepia officinalis) Courtship. Babbacombe, Torquay, South Devon, UK (RR)

908-176 - Cuttlefish (Sepia officinalis) Courtship. Babbacombe, Torquay, South Devon, UK. (A4 only).

908-195 - Cuttlefish (Sepia officinalis) Mating/Courtship. Babbacombe, Torquay, South Devon, UK

908-194 - Cuttlefish (Sepia officinalis) Mating/Courtship. Babbacombe, Torquay, South Devon, UK

908-101 - Mandarin Fish (Synchiropus splendidus). Mabul & Sipadan, Borneo, Malaysia

908-175 - Cuttlefish (Sepia officinalis) Courtship. Babbacombe, Torquay, South Devon, UK (RR)

908-181 - Cuttlefish (Sepia officinalis) Two in courtship, being photographed by diver. Babbacombe, Torquay, South Devon, UK (RR)

908-202 - Cuttlefish (Sepia officinalis) Two in courtship/mating, being filmed by diver. Babbacombe, Torquay, South Devon, UK

1072-7 - Butter hamlets mating at sunset, Cayman Islands

908-203 - Cuttlefish (Sepia officinalis) Two in courtship/mating, being filmed by diver. Babbacombe, Torquay, South Devon, UK (RR)

1036-117 - Grey whale (Eschrichtius robustus). Erect penis during courtship. San Ignacio Lagoon, Baja, California.

1036-113 - Grey whale (Eschrichtius robustus). Penis showing during courtship. San Ignacio Lagoon, Baja, Mexico

1036-66 - Hector's dolphins (Cephalorhynchus hectori) leaping in display. Mouth of Akaroa harbour, near Christchurch in New Zealand.

1034-88 - Gentoo penguins (Pygoscelis papua) mating (male on top), Cuverville Island, Antarctica, Southern Ocean.

995-34 - Black Guillemot (Cepphus grylle) circling in a paring/mating ritual in the middle of Oban Bay with boats in the background. Black Guillemots nest in drains and holes in the sea wall in the middle of Oban town centre. Argyll, Scotland, UK

921-637 - Wild Adult Tufted Puffins (Fratercula cirrhata), Colony, In breeding plumage, Bering Islands (Bering sea), Russia, Asia.

965-314 - Wild Boar (Sus Scrofa), wild. Bandhavgarh Tiger Reserve, India

979-5996 - Lava lizard (Microlophus spp) in the Galapagos Island Archipeligo, Ecuador. Many of the islands within the Galapagos Island Archipeligo have their own endemic species.

979-1809 - Adult wandering albatross (Diomedea exulans) landing on Prion Island, Bay of Isles, South Georgia Island, Southern Atlantic Ocean

979-3217 - Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

979-3215 - Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

979-2624 - Adult Great Egret (Ardea alba) in courtship display near San Jose del Cabo, Baja California Sur, Mexico.

979-3223 - Adult waved albatross (Diomedea irrorata) at breeding colony on Espanola Island in the Galapagos Island Archipelago, Ecuador

979-9529 - Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, Ecuador