71107273 - A male turkey in a mating dance in Rocky Mountain National park, Colorado71156569 - Monarch Butterfly Mating Benalmadena Butterfly Park, Benalmadena, Malaga, Spain71227680 - Crested Caracara (Caracara plancus) Mating adults, Santa Clara Ranch, Starr County, Texas, USA.71156567 - Mating of butterflies Heliconius hecale Benalmadena Butterfly Park, Benalmadena, Malaga, Spain13813025 - Lesser Prairie Chicken (Tympanuchus pallidicinctus) on lek13813021 - Lesser Prairie Chicken (Tympanuchus pallidicinctus) on lek13810466 - Cosumnes River Preserve, California, USA. Sandhill Crane doing courtship dance in a harvested corn field.13897907 - French Pyrenean Pointe, Male smelling a Female in Heat13836106 - Portrait of a tawny eagle, Aquila rapax, in flight. Masai Mara National Reserve, Kenya.13835659 - A pair of swallow-tailed gulls, Larus furcatus. South Plaza Island, Galapagos, Ecuador13835492 - Black-bellied bustard, Lissotis melanogaster, male in courtship display. Savuti, Chobe National Park, Botswana13813066 - White-tailed Deer (Odocoileus virginianus) in autumn13835512 - A male Kori bustard, Ardeotis kori, in courtship display. Savuti, Chobe National Park, Botswana13814147 - Pronghorn buck showing territorial behavior, Antilocapra americana, Grand Tetons National Park, Wyoming13813024 - Lesser Prairie Chicken (Tympanuchus pallidicinctus) on lek13813013 - House Finch (Carpodacus Mexicanus) pair bonding13835745 - Imperial shag pair, Leucocarbo atriceps, courting. Pebble Island, Falkland Islands13813016 - Laughing Gull (Larus atricilla) breeding activity13796615 - Canada, Alberta, Jasper National Park. Bull elk next to Athabasca River13776358 - The male roughsnout ghost pipefish (Solenostomus paegnius) is pictured here in front of the larger green female; Philippines13837299 - A male lion, Panthera leo, snarls as he mates with a submissive female below. Masai Mara National Reserve, Kenya.13835658 - A pair of swallow-tailed gulls, Larus furcatus. South Plaza Island, Galapagos, Ecuador13884975 - Nesting Arctic Terns (Sterna paradisaea) competing for territory on Vigur Island with a flat-topped mountain peak in the background; Vigur Island, Isafjardardjup Bay, Iceland13885626 - A mated pair of northern gannets preen each other on their nest.; Bonaventure Island, Quebec, Canada.13882236 - A pair of light-mantled sooty albatrosses (Phoebetria palpebrata) stand together on the dried grass in the falling snow; South Georgia Island, Antarctica13882867 - Two Black-browed Albatross exhibiting courtship behavior on Steeple Jason Island in the Falkland Islands.13882868 - Two Black-browed Albatross exhibiting courtship behavior on Steeple Jason Island in the Falkland Islands.13882848 - Antarctic Tern courtship display with fish near Elsehul Bay in South Georgia, Antarctica.13937378 - France, Somme, Baie de Somme, Le Crotoy, The marsh of Crotoy welcomes each year a colony of Black-headed Gull (Chroicocephalus ridibundus - Black-headed Gull) which come to nest and reproduce on islands in the middle of the ponds, the couplings are regular\n13936288 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13932319 - France, Somme, Baie de Somme, Le Crotoy, The marsh of Crotoy welcomes each year a colony of Black-headed Gull (Chroicocephalus ridibundus - Black-headed Gull) which come to nest and reproduce on islands in the middle of the ponds, the couplings are regular\n14141895 - Captive Galapagos giant tortoises (Chelonoidis spp), Charles Darwin Research Station, Santa Cruz Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America13932022 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13937895 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13936205 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13928883 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13930059 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13936527 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13933059 - France, Somme, Baie de Somme, Le Crotoy, The marsh of Crotoy welcomes each year a colony of Black-headed Gull (Chroicocephalus ridibundus - Black-headed Gull) which come to nest and reproduce on islands in the middle of the ponds, the couplings are regular\n13931886 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13930797 - France, Somme, Baie de Somme, Le Crotoy, The marsh of Crotoy welcomes each year a colony of Black-headed Gull (Chroicocephalus ridibundus - Black-headed Gull) which come to nest and reproduce on islands in the middle of the ponds, the couplings are regular\n13928823 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n71419072 - Kenya, Maasai Mara, Zebras Putting Their Heads Together13935520 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13934995 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13934414 - France, Somme, Baie de Somme, Crotoy Marsh, Le Crotoy, every year a colony of black-headed gulls (Chroicocephalus ridibundus - Black-headed Gull) settles on the islets of the Crotoy marsh to nest and reproduce , the couplings are frequent\n13931574 - France, Somme, Baie de Somme, Le Crotoy, The marsh of Crotoy welcomes each year a colony of Black-headed Gull (Chroicocephalus ridibundus - Black-headed Gull) which come to nest and reproduce on islands in the middle of the ponds, the couplings are regular\n71335602 - Red Fox / Rotfuchs ( Vulpes vulpes ), two adults, standing on hind legs, threatening each other with wide open jaws, territorial behavoir during rut, wildlife, Europe.71322998 - A male and female leopard, Panthera pardus, fight with each other, using their paws with bared teeth.