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  • Maasai Mara, Kenya. Nikon D500, 200-400mm @ 200mm (300mm in full frame), f4, 1/500sec, ISO800, Aperture priority
    Lions mating (55914-D).jpg
  • Mating common toads (Bufo bufo). Southern Norway in April.
    60010-D.jpg
  • Mating common toads (Bufo bufo). Southern Norway in April.
    60011-D.jpg
  • Mating common toads (Bufo bufo). Southern Norway in April.
    60008-D.jpg
  • Mating common toads (Bufo bufo). Southern Norway in April.
    60009-D.jpg
  • Mating behaviour among a pair of South Polar Skua (Stercorarius maccormicki) at PenguinjIsland, South Shetland Islands, Antarctica.
    44156-D.jpg
  • South Polar Skua (Stercorarius maccormicki) mating at Penguinj Island, South Shetland Islands, Antarctica.
    44157-D.jpg
  • Mating Toads, Bufo bufo.
    3391-D.jpg
  • Lions mating in Maasai Mara, Kenya.
    57823-D.jpg
  • Lions mating in Maasai Mara, Kenya.
    55914-D.jpg
  • Pair of the Ismenius tiger (Heliconius ismenius) mating. Reserva Bambu, Sarapiqui, Costa Rica.
    9770-D.jpg
  • Mating pair of Indian Wild Buffalos (Bulbalus arnee) in Kaziranga National Park, Assam, north-east India.
    56152-D.jpg
  • Mating Toads, Bufo bufo.
    3392-D.jpg
  • Mating pair of lions in Nairobi National Park, Kenya.
    55275-D.jpg
  • Clay-colored rain frogs (Pristimantis cerasinus) mating. Photo from Las Arrieras, Sarapiqui, Costa Rica.
    60167-D.jpg
  • Red-eyed tree frogs (Agalychnis callidryas) mating. Photo from Piedras Blancas National Park, Osa Peninsula, Costa Rica.
    60100-D.jpg
  • Red-eyed tree frogs (Agalychnis callidryas) mating. Photo from Piedras Blancas National Park, Osa Peninsula, Costa Rica.
    60098-D.jpg
  • Red-eyed tree frogs (Agalychnis callidryas) mating while a hourglass treefrog (Dendropophus ebraccatus) interfer. Photo from Piedras Blancas National Park, Osa Peninsula, Costa Rica.
    60097-D.jpg
  • Red-eyed tree frogs (Agalychnis callidryas) mating. Photo  from Piedras Blancas National Park, Osa Peninsula, Costa Rica.
    60095-D.jpg
  • Red-eyed tree frogs (Agalychnis callidryas) mating. Photo from Piedras Blancas National Park, Osa Peninsula, Costa Rica.
    60093-D.jpg
  • Hook-winged net-winged beetles (Lycus melanurus) probably mating. Photo from Zimanga, South Africa.
    9737-D.jpg
  • Pair of mating lions (Panthera leo) in Kruger NP, South Africa.
    56595-D.jpg
  • Pair of lions (Panthera leo) mating in Kruger NP, South Africa.
    56580-D.jpg
  • Mating pair of Gentoo Penguins (Pygoscelis papua) at Elephant Point, South Shetland Islands, Antarctica
    43144-D.jpg
  • Mating Toads, Bufo bufo.
    3381-D.jpg
  • Mating Toads, Bufo bufo.
    3396-D.jpg
  • Mating lions in Nairobi NP, Kenya.
    55330-D.jpg
  • Mating lions in Nairobi NP, Kenya.
    55331-D.jpg
  • Mating lions in Nairobi NP, Kenya.
    55332-D.jpg
  • Red-eyed tree frogs (Agalychnis callidryas) mating. Photo from Piedras Blancas National Park, Osa Peninsula, Costa Rica.
    60096-D.jpg
  • Pair of broad-billed motmot (Electron platyrhynchum) mating. Photo from Las Arrieras, Sarapiqui, Cosdta Rica.
    45549-D.jpg
  • Mating pair of proboscis monkey (Nasalis larvatus) in Tanjung Puting National Park, Kalimantan, Borneo (Indonesia).
    57128-D.jpg
  • Pair of yellow-banded conops (Conops quadrifasciatus) mating. Photo from southern Norway ina August.
    9611-D.jpg
  • South Polar Skua (Stercorarius maccormicki) mating at Penguinj Island, South Shetland Islands, Antarctica.
    44155-D.jpg
  • Pair of Emerald Damselfly, Lestes sponsa, mating. Male at the top.
    9274-D.jpg
  • Mating Toads (Bufo bufo)
    3379-D.jpg
  • Mating Toads, Bufo bufo.
    3395-D.jpg
  • Mating pair of lions in Nairobi National Park, Kenya.
    55329-D.jpg
  • Mating lions in Nairobi NP, Kenya.
    55334-D.jpg
  • Mating lions in Nairobi NP, Kenya.
    55335-D.jpg
  • Pair of the Ismenius tiger (Heliconius ismenius) mating. Reserva Bambu, Sarapiqui, Costa Rica.
    9771-D.jpg
  • Pair of yellow-banded conops (Conops quadrifasciatus) mating. Photo from southern Norway ina August.
    9610-D.jpg
  • Pair of two-tailed spiders (Hersilia sp.) mating on a stem on Komodo Island, Indonesia
    113099-D.jpg
  • Airplane grasshoppers, Eumastax vittata, mating. Photo from La Selva, Ecuador.
    9413-D.jpg
  • Mating Toads, Bufo bufo.
    3402-D.jpg
  • Tired mating pair of lions in Nairobi National Park, Kenya.
    55276-D.jpg
  • Mating lions in Nairobi NP, Kenya.
    55333-D.jpg
  • Craneflies (family Tipulidae) mating. Photo from Andasibe, Madagascar.
    9547-D.jpg
  • Craneflies (family Tipulidae) mating.  Cloudfores of Bosque de Paz, Costa Rica.
    9815-D.jpg
  • Pair of the wingless pyrgomorph grasshopper Omura congrua mating in the rainforest of La Selva, Ecuador.
    9572-D.jpg
  • Pair of the pyrgomorph grasshopper Omura congrua mating in the rainforest of La Selva, Ecuador.
    9571-D.jpg
  • Pair of Black-legged Kitty Wake (Rissa tridactyla) mating at the Bird Cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard.
    41046-D.jpg
  • Pair of Black-legged Kitty Wake (Rissa tridactyla) mating at the Bird Cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard.
    41045-D.jpg
  • African monarch (Danaus chrysippus) mating. Photo from Berenty, southern Madagascar.
    9523-D.jpg
  • A pair of Green Sea Turtles (Chelonia mydas) mate off Espumilla Beach, James Bay, Santiago Island, Galapagos.
    3987-D.jpg
  • Female of the southern pig-tailed macaque (Macaca nemestrina) from Tabin, Sabah, Borneo. The swollen but signales that this female is ready to mate.
    56645-D.jpg
  • A pair of Green Sea Turtles (Chelonia mydas) mate off Espumilla Beach, James Bay, Santiago Island, Galapagos.
    3986-D.jpg
  • Spanish slug (Arion vulgaris) mate and cross breed with a black slug (Arion ater). The slugs have intertwined, everted penises, carrying out external sperm exchange between two different species.
    7223-D.jpg
  • A pair of Green Sea Turtles (Chelonia mydas) mate off Espumilla Beach, James Bay, Santiago Island, Galapagos.
    3461-D.jpg
  • A pair of rhesus macaques (Macaca mulatta) mate in the tree tops. Photo from Kaziranga National Park, Assam, north-east India.
    56179-D.jpg
  • Fighting for the female and the right to spawn among the common toad (Bufo bufo). Southern Norway, in April.
    60012-D.jpg
  • Fighting for the female and the right to spawn among the common toad (Bufo bufo). Southern Norway, in April.
    60007-D.jpg
  • Pair of red-eyed tree frogs (Agalychnis callidryas) spawning.. Photo  from Piedras Blancas National Park, Osa Peninsula, Costa Rica.
    60092-D.jpg
  • Egg strains of Toads (Bufo bufo). South-western Norway in April.
    3405-D.jpg
  • Egglaying Toads (Bufo bufo), embedded in their egg strains.  From southern-Norway in April.
    3412-D.jpg
  • Egglaying Toads (Bufo bufo), embedded in their egg strains.  From southern-Norway in April.
    3410-D.jpg
  • Red-eyed tree frog (Agalychnis callidryas) from Piedras Blancas National Park, Osa Peninsula, Costa Rica.
    60094-D.jpg
  • Gaur (Bos gaurus). Angry bull from Tadoba NP, India.
    55716-D.jpg
  • Cranefly (Family Tipulidae) from the cloudforest of Bosque de Paz, Costa Rica.
    9811-D.jpg
  • Female house sparrow (Passer domesticus) feeding a large chick.  South-western Norway in mid May.
    44672-D.jpg
  • Glaucous Gull (Larus hyperboreus) nesting at Hornsund, south-western Spitsbergen, Svalbard.
    41256-D.jpg
  • Glaucous Gull (Larus hyperboreus) nesting at Hornsund, south-western Spitsbergen, Svalbard.
    41255-D.jpg
  • Gentoo penguin (Pygoscelis papua) feeding its juveniles at Saunders Island, the Falklands.
    43318-D.jpg
  • Black-legged Kitti Wake (Rissa tridactyla) nesting in the bird cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard. Do note the tall nest pillar, which is very old and where a new nest is built on top of last year's nest.
    41236-D.jpg
  • Black-legged Kitti Wake (Rissa tridactyla) nesting in the bird cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard. Do note the tall nest pillar, which is very old and where a new nest is built on top of last year's nest.
    41235-D.jpg
  • Black-legged Kitti Wake (Rissa tridactyla) in the bird cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard.
    41231-D.jpg
  • Black-legged Kitti Wake (Rissa tridactyla) in the bird cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard.
    41227-D.jpg
  • Glaucous Gull (Larus hyperboreus) nesting at Hornsund, south-western Spitsbergen, Svalbard.
    44788-D.jpg
  • Female house sparrow (Passer domesticus) feeding a large chick.  South-western Norway in mid May.
    44679-D.jpg
  • Male house sparrow (Passer domesticus) feeding a large chick.  South-western Norway in mid May.
    44671-D.jpg
  • Male house sparrow (Passer domesticus) feeding a large chick.  South-western Norway in mid May.
    44636-D.jpg
  • Hidra, Agder, south-western Norway. Nikon D500, 600mm (900mm in full frame), f4, 1/400sec, ISO640, Manual modus.
    Growing up (44636-D).jpg
  • Gentoo penguin (Pygoscelis papua) feeding its chick at Saunders Island, the Falklands.
    43316-D.jpg
  • Harlequin Tree Frogs (Rhacophorus pardalis) spawn in Kubah National Park, Sarawak, Borneo
    3578-D.jpg
  • Harlequin Tree Frogs (Rhacophorus pardalis) spawn in Kubah National Park, Sarawak, Borneo
    3577-D.jpg
  • Black-legged Kitti Wake (Rissa tridactyla) nesting in the bird cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard.
    41242-D.jpg
  • Black-legged Kitti Wake (Rissa tridactyla) nesting in the bird cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard.
    41251-D.jpg
  • Black-legged Kitti Wake (Rissa tridactyla) nesting in the bird cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard.
    41249-D.jpg
  • Black-legged Kitti Wake (Rissa tridactyla) nesting in the bird cliff at Vestre Burgerbukta, Hornsund, south-western Spitsbergen, Svalbard.
    41247-D.jpg
  • Pair of Galapagos Penguins (Spheniscus mendiculus) mating on the island of Santiago
    42236-D.jpg
  • Seven-spotted Ladybird, Coccinella septempunctata, mating.
    9380-D.jpg
  • Pair of Galapagos Penguins (Spheniscus mendiculus) mating on the island of Santiago
    42235-D.jpg
  • Seven-spotted Ladybird, Coccinella septempunctata, mating.
    9378-D.jpg
  • Seven-spotted Ladybird, Coccinella septempunctata, mating.
    9379-D.jpg
  • Fake mating among Thonson Gazella (Eudorcan thomsonii) in Maasai mara, Kenya.
    56728-D.jpg
  • Mating pair of Indian Wild Buffalos (Bulbalus arnee) with two Jungle Mynas in Kaziranga National Park, Assam, north-east India.
    56147-D.jpg
  • Mating pair of Gentoo Penguins (Pygoscelis papua) from Elephant Point, South Shetland Islands, Antarctica
    43142-D.jpg
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Alf J. Nilsen Natural History images

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