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  • Male flowers of scots pine (Pinus sylvestris) are releasing the pollen.
    112135-D.jpg
  • Male flowers of scots pine (Pinus sylvestris) are releasing the pollen.
    112134-D.jpg
  • Male flowers of scots pine (Pinus sylvestris) are releasing the pollen.
    112136-D.jpg
  • Two male lions (Panthera leo) feeding on a newly killed wildebeest in Maasai Mara, Kenya.
    56605-D.jpg
  • Two male lions (Panthera leo) feeding on a newly killed wildebeest in Maasai Mara, Kenya.
    56603-D.jpg
  • Two male lions (Panthera leo) feeding on a newly killed wildebeest in Maasai Mara, Kenya.
    56604-D.jpg
  • Big male lion (Panthera leo) with dark mane drinking from a stream in Maasai Mara, Kenya.
    56716-D.jpg
  • Sharp-beaked ground finch (Geospiza difficilis, male ) from genovesa, Galapagos.
    44824-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44542-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44538-D.jpg
  • Black-tailed skimmer (Orthetrum cancellatum, male) from Vejlerne, northern Denmark in June.
    9622-D.jpg
  • Male nyala antelope (Tragelaphus angasii) from Zimanga Private Reserve, South Africa.
    57035-D.jpg
  • Breeding male of the red-collared widowbird (Euplectes ardens) from Zimanga, South Africa in November.
    45187-D.jpg
  • Male nyala antelope (Tragelaphus angasii) from Zimanga Private Reserve, South Africa.
    57013-D.jpg
  • Male lion drinking in Maasia Mara, Kenya.
    56714-D.jpg
  • Common hazel (Corylus avellana) with male catkins and one female flower.
    112125-D.jpg
  • Yellow Warbler (Setophaga petechia aureola, male) from James Bay, Santiago Island, Galapagos.
    44804-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44543-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44520-D.jpg
  • Male lion (Panthera leo) in Knuger NP, South Africa.
    56594-D.jpg
  • Young male lions (Panthera leo) in Knuger NP, South Africa.
    56493-D.jpg
  • Male nyala antelope (Tragelaphus angasii) with his harem of females in the forest of Zimanga Private Reserve, South Africa.
    56471-D.jpg
  • Male nyala antelope (Tragelaphus angasii) from Zimanga Private Reserve, South Africa.
    56436-D.jpg
  • Male flowers of scots pine (Pinus sylvestris) from northern Denmark in late May.
    12098-D.jpg
  • Swamp deer, also known as barasinga (Rucervus duvaucelii, male) feeding in water in Kanha National Park, Madhya Pradesh, India.
    56221-D.jpg
  • Male of the dragonfly Brachygonia oculata from Tanjung Puting National Park, Indonesia.
    9487-D.jpg
  • Quee of the bumblebee (Bombus lapponicus scandinavicus) with parasitic mites feeding on male Willov flower at Dyranut, Hardangervidda southern Norway in late June.
    9478-D.jpg
  • Quee of the bumblebee (Bombus lapponicus scandinavicus) feeding on male Willov flower at Dyranut, Hardangervidda southern Norway in late June.
    9479-D.jpg
  • A male lion with its face full of flies.  Maasai Mara, Kenya, in July 2014.
    55526-D.jpg
  • Male lion in the long grass of Maasai Mara, Kenya.
    55554-D.jpg
  • Male catkins (flowers) of common hazel (Corylus avellana).
    112126-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44547-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44539-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44540-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44537-D.jpg
  • Mature staminate (male ) flower of common bulrush (Typha latifolia) from Vejlerne, northern Denmark in June.
    12101-D.jpg
  • Black-tailed skimmer (Orthetrum cancellatum, young male) from Vejlerne, northern Denmark in June.
    9624-D.jpg
  • Black-tailed skimmer (Orthetrum cancellatum, male) from Vejlerne, northern Denmark in June.
    9623-D.jpg
  • Young male lion (Panthera leo) in Knuger NP, South Africa.
    56495-D.jpg
  • Male nyala antelopes (Tragelaphus angasii) from Zimanga Private Reserve, South Africa.
    56437-D.jpg
  • Male of the Spine-tufted skimmer (Orthetrum chrysis) from Deramakot Forest Reserve, Sabah, Borneo
    9481-D.jpg
  • Breeding male of the red-collared widowbird (Euplectes ardens) from Zimanga, South Africa in November.
    45188-D.jpg
  • Big male lion (Panthera leo) with dark mane. Photo from Maasai Mara, Kenya.
    56715-D.jpg
  • Pine grosbeak (Pinicola enucleator, male) from Pasvik, Finnmark, Norway in March.
    44536-D.jpg
  • Young male lion (Panthera leo) in Knuger NP, South Africa.
    56494-D.jpg
  • Maasai Mara, Kenya.  Nikon D700, 200-400mm + TC17 @ 650mm, f6.7, 1/400sec, ISO400, Manual madus
    Muddy lion (55037-D).jpg
  • Muddy Lion (Panthera leo) from Maasai Mara, Kenya.
    55037-D.jpg
  • Cross section through a testes with immature sperm cells clearly visible.
    17034-D.jpg
  • Pasvik, Finnmark, Norway. Nikon D500, 600mm (900mm in full frame), f4, EV+2.67, 1/1000sec, ISO200, Aperture priority.
    Pine Grosbeak (44547-D).jpg
  • Female of the red-collared widowbird (Euplectes ardens) from Zimanga, South Africa in November.
    45313-D.jpg
  • Rooster of the domesticated fowl (Gallus gallus domesticus) calling.
    43874-D.jpg
  • Purple sunbird (Cinnyris asiaticus) with the yellow flowers of the introduced vine Tecoma stans. Photo from Chanoud,  Rajasthan, India.
    43809-D.jpg
  • Man from Chanoud, Rajasthan, India.
    87134-D.jpg
  • Sulawesi lined gliding lizard (Draco spilonotus) from Tangkoko National Park, northern Sulawesi, Indonesia
    3636-D.jpg
  • Sulawesi lined gliding lizard (Draco spilonotus) from Tangkoko National Park, northern Sulawesi, Indonesia
    3634-D.jpg
  • Jawai area, Rajasthan, India.  Nikon D810, Sigma 150-600mm @ 600mm, f6.3, 1/800sec, ISO800, Aperture priority
    Sunbird (42972-D).jpg
  • Man from Rajasthan.
    72051-D.jpg
  • Men from Chanoud, Rajasthan, India.
    72063-D.jpg
  • Man from Rajasthan.
    72067-D.jpg
  • Man from Chandoud, Rajasthan, India.
    72069-D.jpg
  • Female of the red-collared widowbird (Euplectes ardens) from Zimanga, South Africa in November.
    45314-D.jpg
  • Common bulrush (Typha latifolia) from Vejlerne, Jylland, northern Denmark in September.
    112262-D.jpg
  • Common bulrush (Typha latifolia) from Vejlerne, Jylland, northern Denmark in September.
    112263-D.jpg
  • Pine grosbeak (Pinicola enucleator, female) from Pasvik, Finnmark, Norway in March.
    44546-D.jpg
  • Pine grosbeak (Pinicola enucleator, female) from Pasvik, Finnmark, Norway in March.
    44545-D.jpg
  • Pine grosbeak (Pinicola enucleator, female) from Pasvik, Finnmark, Norway in March.
    44544-D.jpg
  • Pine grosbeak (Pinicola enucleator, female) from Pasvik, Finnmark, Norway in March.
    44541-D.jpg
  • Pair of mating lions (Panthera leo) in Kruger NP, South Africa.
    56595-D.jpg
  • Rooster of the domesticated fowl (Gallus gallus domesticus) calling.
    43876-D.jpg
  • Rooster of the domesticated fowl (Gallus gallus domesticus) calling.
    43875-D.jpg
  • Purple sunbird (Cinnyris asiaticus) calling. Photo from in Chanoud, Rajasthan, India.
    43812-D.jpg
  • Purple sunbird (Cinnyris asiaticus) feeding on nectar from the introduced plant Prosopis juliflora in Chanoud, Rajasthan, India.
    43811-D.jpg
  • Sulawesi lined gliding lizard (Draco spilonotus) from Tangkoko National Park, northern Sulawesi, Indonesia
    3635-D.jpg
  • Old men from Rajasthan.
    72050-D.jpg
  • Blind man with turban. Chanoud, Rajasthan, India.
    72062-D.jpg
  • Purple sunbird (Cinnyris asiaticus) on a Sodom apple plant (Callotropis procera), Rajasthan, India.
    42972-D.jpg
  • Male lions greeting eachother on the savannah in Maasai Mara, Kenya.
    56102-D.jpg
  • Maasai Mara, Kenya. Nikon D5, 600mm, f4, EV+0.33, 1/5000sec, ISO400, Aperture priority
    Male Cheetah (56075-D).jpg
  • Male Bearded reedling (Panurus biarmicus, male) from Vejlerne, northern Denmark in June 2022.
    44991-D.jpg
  • Male Bearded reedling (Panurus biarmicus, male) from Vejlerne, northern Denmark in June 2022.
    44988-D.jpg
  • Male Bearded reedling (Panurus biarmicus, male) from Vejlerne, northern Denmark in June 2022.
    44992-D.jpg
  • Male Bearded reedling (Panurus biarmicus, male) from Vejlerne, northern Denmark in June 2022.
    44989-D.jpg
  • Two male black grouse (Lyrurus tetrix, male) fighting one early morning in April. Photo from southern Norway.
    44928-D.jpg
  • Two male black grouse (Lyrurus tetrix, male) displaying and fighting one early morning in April. Photo from southern Norway.
    44923-D.jpg
  • Male Bearded reedling (Panurus biarmicus, male) from Vejlerne, northern Denmark in June 2022.
    44990-D.jpg
  • Large male sambar deer (Cervus unicolor) feeding in the foggy forest of Nagarahole Tiger Reserve, Karnataka, southern India.
    57108-D.jpg
  • Gaur (Bos frontalis, male) resting in the grass of Nagarahole Tiger Reserve, Karnataka, India. Two jungle mynas (Acridotheres fuscus) are sitting on the bull's back.
    57104-D.jpg
  • Male lion (Panthere leo) from Satara, Kruger NP, South Africa.
    57090-D.jpg
  • Male lion (Panthere leo) from Satara, Kruger NP, South Africa.
    57089-D.jpg
  • Male greater kudu (Tragelaphus strepsiceros) from Lower Sabie, Kruger NP, South Africa.
    57086-D.jpg
  • Male lion (Panthera leo) drinking at a waterhole at Lower Sabie, Kruger NP, South Africa.
    57083-D.jpg
  • Male lions (Panthera leo) drinking at a waterhole at Lower Sabie, Kruger NP, South Africa.
    57079-D.jpg
  • Southern red bishop (Euplectes orix, breeding male) at its nest at Lower Sabie, Kruger NP, South Africa in November.
    45415-D.jpg
  • Male lions (Panthera leo) drinking at a waterhole at Lower Sabie, Kruger NP, South Africa.
    49029-D.jpg
  • Male lions (Panthera leo) drinking at a waterhole at Lower Sabie, Kruger NP, South Africa.
    49029-D.jpg
  • Southern red bishop (Euplectes orix, breeding male) at its nest at Lower Sabie, Kruger NP, South Africa in November.
    45386-D.jpg
  • Yellow-throated longclaw (Macronyx croceus, male) from Lower Sabie, Kruger NP, South Africa.
    45376-D.jpg
  • Southern masked weaver (Ploceus velatus, male) at Lower Sabie, Kruger NP, South Africa.
    45373-D.jpg
  • Male of southern masked weaver (Ploceus velatus) building nest at Lower Sabie, Kruger NP, South Africa.
    45370-D.jpg
  • Male red-billed firefinch (Lagonosticta senegala) from Zimanga, South Africa.
    45301-D.jpg
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Alf J. Nilsen Natural History images

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