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  • Tourists photographing a colony of Gentoo Penguins at Cuverville Island, the Antarctic Peninsula.
    150054-D.jpg
  • Large colony of Northern Gannets (Morus bassanus) at Gjesvaer, close to Nordkapp, Finnmark, Norway.
    41488-D.jpg
  • Large colony of Northern Gannets (Morus bassanus) at Gjesvaer, close to Nordkap, Finnmark, Norway.
    41266-D.jpg
  • Large colony of Northern Gannets (Morus bassanus) at Gjesvaer, close to Nordkap, Finnmark, Norway.
    41265-D.jpg
  • Large colony of Northern Gannets (Morus bassanus) at Gjesvaer, close to Nordkap, Finmark, Norway.
    41489-D.jpg
  • Large colony of Northern Gannets (Morus bassanus) at Gjesvaer, close to Nordkap, Finnmark, Norway.
    41268-D.jpg
  • Large colony of Northern Gannets (Morus bassanus) at Gjesvaer, close to Nordkap, Finnmark, Norway.
    41257-D.jpg
  • Large colony of breeding Gentoo Penguins (Pygoscelis papua) at The Neck, Saunders Island, the Falklands.
    43322-D.jpg
  • Colony of black-browed albatross (Thalassarche melanophrys) nesting at Saunders Island (close to Rockery cabin), the Falkland Islands.
    43315-D.jpg
  • Large colony of Northern Gannets (Morus bassanus) at Gjesvaer, close to Nordkap, Finnmark, Norway.
    41262A-D.jpg
  • Large colony of Northern Gannets (Morus bassanus) at Gjesvaer, close to Nordkap, Finnmark, Norway.
    41258-D.jpg
  • Colony of giant honey bee (Apis dorsata) in the backyard of a house in Rajasthan, India.
    9586-D.jpg
  • Colony of whaleruses at Poolepynten, Prins Karls Forland, Svalbard.
    55216-D.jpg
  • Colony of giant honey bee (Apis dorsata) from Tangkok National Park, North Sulawesi, Indonesia
    9756-D.jpg
  • Colony of giant honey bee (Apis dorsata) from Tangkok National Park, North Sulawesi, Indonesia
    9755-D.jpg
  • Close up of the bies in a colony of giant honey bees (Apis dorsata) from Tangkok National Park, North Sulawesi, Indonesia
    9757-D.jpg
  • Colony of Chinstrap Penguins (Pygoscelis antarcticus) at Hydrurga Rocks, Antarctica.
    44163-D.jpg
  • Breeding colony of King Penguins (Aptenodytes patagonicus patagonicus) at Volunteer Point, the Falklands.
    43441-D.jpg
  • Gentoo penguin colony at Georges Point, Ronge Island, Antarctica
    150026-D.jpg
  • Breeding colony of Chinstrap Penguins (Pygoscelis antarctica) on the top of Useful Island, Antarctica
    43138-D.jpg
  • Colony of Cattle Egrets (Bulbulcus ibis) resting in a submerged acasia tree in Lake Naivasha, Kenya.
    42460-D.jpg
  • Colony of black-browed albatross (Thalassarche melanophrys) nesting at Saunders Island (close to Rockery cabin), the Falkland Islands.
    43291-D.jpg
  • Gentoo penguin colony at Georges Point, Ronge Island, Antarctica
    43146-D.jpg
  • Light house and cormorant colony at Flatholmen, Skaarvaagen, Langöy, Vestrålen, Norway.
    24732-D.jpg
  • Colony of giant honey bee (Apis dorsata) in Rajasthan, India.
    9585-D.jpg
  • Colony of black-browed albatross (Thalassarche melanophrys) nesting at Saunders Island (close to Rockery cabin), the Falkland Islands.
    43281-D.jpg
  • Colony of black-browed albatross (Thalassarche melanophrys) nesting at Saunders Island (close to Rockery cabin), the Falkland Islands.
    43270-D.jpg
  • Colonies of southern rockhopper penguins mixed with blue-eyed shags at Saunders Island, the Falklands.
    43314-D.jpg
  • Spectatcular mountains and Gentoo penguin colonies at Cuverville Island, Errera Channel, on the western side of the Antarctic Peninsula
    150039-D.jpg
  • Large Gentoo penguin colonies at Cuverville Island, Errera Channel, on the western side of the Antarctic Peninsula
    150038-D.jpg
  • Evening view from Useful Island towards Graham Land, Antarctic Peninsula, Antarctica. Do note the many Gentoo penguin colonies in the foreground
    150021-D.jpg
  • Evening view from Useful Island towards Graham Land, Antarctic Peninsula, Antarctica. Do note the many Gentoo penguin colonies in the foreground
    150023-D.jpg
  • Colonies of southern rockhopper penguins mixed with blue-eyed shags at Saunders Island, the Falklands.
    43313-D.jpg
  • Evening view from Useful Island towards Graham Land, Antarctic Peninsula, Antarctica.  Do note the many Gentoo penguin colonies in the foreground
    150022-D.jpg
  • Brown Bluff and the Tabarin Peninsula (Antarctic Sound) is a basalt tuya formed in the past 1 million years. The site, which is a well-known landing site in the area, is home to thousands of Gentoo and Adelie penguins.
    150009-D.jpg
  • Hydrurga Rocks, Antarctica. Nikon D850, 70-200mm @ 170mm, f5.6, EV+1.33, 1/2000sec, ISO640, Aperture priority
    Chinstrap Penguins (44163-D).jpg
  • Evening view from Useful Island towards Graham Land, Antarctic Peninsula, Antarctica.
    150027-D.jpg
  • Lake Naivasha, Kenya.  Nikon D4, 24-70mm @ 48mm, f3.2, 1/5000sec, ISO400, Manual modus
    Lake Naivasha (40071-D).jpg
  • Sunset and resting cormorants in submerged trees during very high water level at Lake Naivasha, Kenya.
    40185-D.jpg
  • Whale rus (Odobenus rosmarus) at Poolepynten, Prins Karls Forland, Svalbard.
    55219-D.jpg
  • Relaxed Whale rus (Odobenus rosmarus) at Poolepynten, Prins Karls Forland, Svalbard.
    55218-D.jpg
  • Whale rus (Odobenus rosmarus) at Poolepynten, Prins Karls Forland, Svalbard.
    55217-D.jpg
  • Northern Gannets (Morus bassanus) nesting in a large bird cliff at the island of Runde, north-western Norway.
    41537-D.jpg
  • Northern Gannets (Morus bassanus) nesting in a large bird cliff at the island of Runde, north-western Norway.
    41540-D.jpg
  • Northern Gannets, Morus bassanus, nesting in a large bird cliff at the island of Runbde, north-western Norway.  Do note how the birds have built their colorful nests from fishing nets gathered from the ocean.
    41533-D.jpg
  • Sunset and resting cormorants at Lake Naivasha, Kenya.
    40071-D.jpg
  • Northern Gannets (Morus bassanus) nesting in a large bird cliff at the island of Runde, north-western Norway. Do note how the birds have built their colorful nests from fishing nets gathered from the ocean.
    41543-D.jpg
  • Northern Gannets (Morus bassanus) nesting in a large bird cliff at the island of Runde, north-western Norway.
    41542-D.jpg
  • Northern Gannets, Morus bassanus, nesting in a large bird cliff at the island of Runbde, north-western Norway.  Do note how the birds have built their colorful nests from fishing nets gathered from the ocean.
    41534-D.jpg
  • Northern Gannets, Morus bassanus, nesting in a large bird cliff at the island of Runbde, north-western Norway.  Do note how the birds have built their colorful nests from fishing nets gathered from the ocean.
    41532-D.jpg
  • Juvenile sand martins (Riparia riparia) in their nest burrows. Photo from south-western Norway in August.
    44746-D.jpg
  • Flooded acasia tree serves as a resting place for cattle egrets and great cormorants in Lake Naivasha, Kenya.
    40187-D.jpg
  • Flooded acasia tree serves as a resting place for cattle egrets and great cormorants in Lake Naivasha, Kenya.
    44959-D.jpg
  • Hungry sand martin chicks (Riparia riparia) screaming for their mother to return with food. Photo from south-western Norway in August.
    44745-D.jpg
  • Juvenile sand martins (Riparia riparia) watching the mother approaching their nest cave. Photo from south-western Norway in August.
    44742-D.jpg
  • Sand martins (Riparia riparia) at their nest burrow. Photo from south-western Norway in August.
    44744-D.jpg
  • Juvenile sand martins (Riparia riparia) being fed in their burrows by their adult mother. Photo from south-western Norway in August.
    44743-D.jpg
  • Street life at Patariya Market, Jabalpur, Madhya Pradesh, India.
    87113-D.jpg
  • Shop in Jabalpur, Madhya Pradesh, India.
    87112-D.jpg
  • Gentoo penguins (Pogoscelis papua) in evening silhuette at Georges Point, Ronge Island, Antarctica
    150034-D.jpg
  • A Gentoo penguin at Georges Point, Ronge Island, Antartica in late evening in Spring.
    150033-D.jpg
  • Evening at Georges Point, Rongé Island, Antarctica
    150031-D.jpg
  • Lonely gentoo penguin at Georges Point, Ronge Island, late in the evening in the Antarctic Spring
    150025-D.jpg
  • Old Couple. Two Gentoo penguins at Georges Point, Ronge Island, Antartica in late evening in Spring.
    150024-D.jpg
  • A Chinstrap penguin (Pygoscelis antarctica) displays on the top of Useful Islland, Antarctica
    43137-D.jpg
  • Huge walrus (Odobenus rosmarus) in the water off Poolepynten, Prins Karls Forland, western Spitsbergen, Svalbard, Norway
    55747-D.jpg
  • Street life in Jabalpur, Madhya Pradesh, India.
    87114-D.jpg
  • Evening at Georges Point, Rongé Island, Antarctica
    150001-D.jpg
  • Walerusses (Odobenus rosmarus) at Poolepynten, Prins Karls Forland, Svalbard, Norway.
    55339-D.jpg
  • Juvenile sand martins (Riparia riparia) in their nest burrows. Photo from south-western Norway in August.
    44747-D.jpg
  • A Gentoo penguin at Georges Point, Ronge Island, Antartica in late evening in Spring.
    150032-D.jpg
  • Georges Point, Rongé Island, Antarctica. Nikon D850, 70-200mm @ 100mm, f4.5, 1/250sec, ISO160, Manual modus
    Evening in Antarctica (150001-D).jpg
  • Walerus (Odobenus rosmarus) at Poolepynten, Prins Karls Forland, Svalbard, Norway.
    55342-D.jpg
  • Ecotourists and Gentoo penguin colonies at Mikkelsen Harbor, Trinity Island on the Antarctic Peninsula. The refuge hut was raised by the Argentinian Antarctic Expedition 1954-1955
    150016-D.jpg
  • Small sea-squirts of the species Trididemnum miniatummolle growing on a larger sea-squirt (Polycarpa sp.) photographed at Ribbin Reef #9, Great B
    10027.jpg
  • Marine bryozoa (moss animals) of the species Mambranipora membranaceae from coastal waters of southern Norway.
    118002.jpg
  • Green reef sea-squirts (Didemnum molle) and other sea-squirts from family Didemnidae at Bunaken, North Sulawesi.
    10119.jpg
  • Green reef sea-squirts (Didemnum molle) from the Maldives
    10006.jpg
  • Marine bryozoa (moss animals) of the species Mambranipora membranaceae from coastal waters of southern Norway.
    118023.jpg
  • Marine bryozoa (moss animals) of the species Mambranipora membranaceae from coastal waters of southern Norway.
    118022.jpg
  • Green reef sea-squirts (Didemnum molle) growing on top of another sea-squirt (Polycarpa sp.) at Bunaken, North Sulawesi.
    10117.jpg
  • Green reef sea-squirt (Didemnum molle) from the Maldives.
    10101.jpg
  • Gentoo penguin (Pygoscelis papua) and icy landscape at Mikkelsen Harbor, Trinity Island, Antarctica
    150018-D.jpg
  • Mikkelsen Harbor, Trinity Island on the Antarctic Peninsula. The refuge hut was raised by the Argentinian Antarctic Expedition 1954-1955
    150017-D.jpg
  • Fragments of stony coral (Seriatopora hystria) propagated in a land-based farm for growing into a larger colony.
    130012-D.jpg
  • Fragment of a stony coral (Stylophora sp.) propagated in a land-based farm for growing into a larger colony.
    130019-D.jpg
  • Fragment of a stony coral (Seriatopora sp.) propagated in a land-based farm for growing into a larger colony.
    130020-D.jpg
  • Fragment of a stony coral (Stylophora sp.) propagated in a land-based farm for growing into a larger colony.
    130017-D.jpg
  • Nest colony of the southern masked veaver (Ploceus velatus) at Sunset Dam, Lower Sabie, Kruger NP, South Africa.
    45349-D.jpg
  • Nest colony of the southern masked veaver (Ploceus velatus) at Sunset Dam, Lower Sabie, Kruger NP, South Africa.
    45348-D.jpg
  • Colony of salps photographed at Phi-Phi Island, Thailand.
    10133.jpg
  • Ascidian colony of the species Diplosoma simile growing entangled among coral rocks on a reef in the Philippines.
    10026.jpg
  • Gentoo colony at Elephant Point, South Shetland Islands, Antarctica
    150020-D.jpg
  • Cyanobacteria (Arthrospira platensis - often called "Spirulina") sampled from Lake Nakuru, Kenya. The longest colony is about 0,14mm long.
    17111-D.jpg
  • Cyanobacteria (Arthrospira platensis - often called "Spirulina") sampled from Lake Nakuru, Kenya. The colony is about 0,12mm long photographed at 200X at the film plane.
    17108-D.jpg
  • Cyanobacteria (Arthrospira platensis - often called "Spirulina") sampled from Lake Nakuru, Kenya. The colony is about 0,096mm long.
    17105-D.jpg
  • Soft coral colony  (Briareum sp.) growing in a marine auarium with the purple stolon and polyps well visible.
    5383.jpg
  • New zooids forming as the colony of sea squirts (Pycnoclavella sp.?) replicates. Aquariumphoto
    10122.jpg
  • Ascidian colony of the species Diplosoma simile growing entangled among coral rocks on a shallow reef in the Maldives.
    10085.jpg
  • Several species of lichens growing on rock in Lierne National Park (Tröndelag, Norway).  Ophioparma ventosa (lower right),  Porpidia sp (background) and Porpidia flavocaerulescens (lower left). There is also a small colony of map lichen (Cladonia geographica) at lower left.
    216026-D.jpg
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Alf J. Nilsen Natural History images

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