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  • Black-bellied whistling duck (Dendrocygna autumnalis) from Arizona, USA
    43208-D.jpg
  • Four Peaks (Tonto National Park), Arizona, USA
    22120-D.jpg
  • Sunset in Tonto National Park, Arizona, USA
    22121-D.jpg
  • Tracking on horseback through the desert of The Superstitions, southern Arizona, USA
    22025-D.jpg
  • Four Peaks (Tonto National Park), Arizona, USA
    22119-D.jpg
  • Desert vegetation with several saguaros (Carnegiea gigantea) in Saguaro National Park, southern Arizona, USA
    22118-D.jpg
  • Desert vegetation with several saguaros (Carnegiea gigantea) in Saguaro National Park, southern Arizona, USA
    22116-D.jpg
  • Male Mandarin Duck (Aix galericulata) from Wildlife World Zoo, Phoenix, Arizona, USA
    43203-D.jpg
  • Organ Pipe National Monument, southern Arizona, USA
    22073-D.jpg
  • Organ Pipe National Monument, southern Arizona, USA
    22072-D.jpg
  • Overlooking Lake Pleasant, Arizona, USA
    22067-D.jpg
  • Wash Overlook Picketpost Mountain, Tonto National Forest, Arizona, USA
    22064-D.jpg
  • Barrel cacti overlooking the city of Phoenix, Arizona, USA
    22066-D.jpg
  • Tracking on horseback through the desert of The Superstitions, southern Arizona, USA
    22023-D.jpg
  • Desert vegetation with several saguaros (Carnegiea gigantea) in Saguaro National Park, southern Arizona, USA
    22117-D.jpg
  • Saguaro National Park, southern Arizona, USA. Nikon D500, 70-200mm @ 70mm (105mm in full frame), f10, EV+0.33, 1/200sec, ISO400, aperture priority
    Saguaro National Park (BIQ3925).jpg
  • Along North Beeline Highway, Tonto National Forest, Arizona, USA. Nikon D500, 18-35mm @ 18mm (27mm in full frame), f14, EV-0.33, 1/800sec, ISO500, Aperture priority
    John Bell (22105-D).jpg
  • Theodor Roosevelt Lake, Tonto National Forest, Arizona, USA.
    22112-D.jpg
  • Theodor Roosevelt Lake, Tonto National Forest, Arizona, USA.
    22115-D.jpg
  • Theodor Roosevelt Lake, Tonto National Forest, Arizona, USA.
    22113-D.jpg
  • View from Four Peaks Wilderness Area (Tonto National Forest) towards Usery Mountain Regional Park, Arizona, USA.
    22110-D.jpg
  • In the memory of John Bell.  Memorial cross and cacti vegetation along North Beeline Highway, close to Sycamore Creek, Tonto National Forest, Arizona, USA.
    22105-D.jpg
  • A young American black bears (Ursus americanus) climbing tree at Bearizona, Arizona, USA. (Controlled conditions).
    56656-D.jpg
  • A young American black bear (Ursus americanus) climbing tree at Bearizona, Arizona, USA. (Controlled conditions).
    56655-D.jpg
  • Three young American black bears (Ursus americanus) climbing trees at Bearizona, Arizona, USA. (Controlled conditions).
    56651-D.jpg
  • Young American black bear (Ursus americanus) climbing a tree at Bearizona, Arizona, USA. (Controlled conditions).
    56650-D.jpg
  • Rosy-faced love birds (Agapornis roseicollis). Photo from Phoenix, Arizona (USA) where a population originating from escaped captivated birds has been established.
    44191-D.jpg
  • Rosy-faced love birds (Agapornis roseicollis). Photo from Phoenix, Arizona (USA) where a population originating from escaped captivated birds has been established.
    44192-D.jpg
  • Rosy-faced love bird (Agapornis roseicollis). Photo from Phoenix, Arizona (USA) where a population originating from escaped captivated birds has been established.
    44194-D.jpg
  • Rosy-faced love birds (Agapornis roseicollis). Photo from Phoenix, Arizona (USA) where a population originating from escaped captivated birds has been established.
    44193-D.jpg
  • Juvenile saguaros (Carnegiea gigantea,) from Picacho Peak State Park (Arizona, USA) in March 2020.
    22103-D.jpg
  • Blooming desert with large population of "brittle bush" among saguaro cacti at Picacho Peak State Park (Arizona, USA) in March 2020.
    22101-D.jpg
  • Blooming desert with large population of "golden poppies" at Picacho Peak State Park (Arizona, USA) in March 2020.
    22098-D.jpg
  • Blooming desert at Picacho Peak State Park (Arizona, USA) in March 2020.
    22096-D.jpg
  • Blooming desert at Picacho Peak State Park (Arizona, USA) in March 2020.
    22095-D.jpg
  • Blooming desert at Picacho Peak State Park (Arizona, USA) in March 2020.
    22089-D.jpg
  • Blooming desert at Picacho Peak State Park (Arizona, USA) in March 2020.
    22093-D.jpg
  • Blooming desert at Picacho Peak State Park (Arizona, USA) in March 2020.
    22091-D.jpg
  • Blooming desert at Picacho Peak State Park (Arizona, USA) in March 2020.
    22090-D.jpg
  • Desert landscape from Picacho Peak State Park (Arizona, USA) in March 2020.
    22086-D.jpg
  • Desert shrubs, blue palo verde, and a young saguaro cactus in  Picacho Peak State Park (Arizona, USA). March 2020.
    22080-D.jpg
  • Desert vegetation in Pichacho Peake State Park (Arizona, USA) an early morning in March 2020.
    22081-D.jpg
  • Morning scene from Picacho Peak State Park  (Arizona, USA) with flowering brittlebush, cacti and and other desert shrubs. March 2020.
    22079-D.jpg
  • Morning scene from Picacho Peak State Park (Arizona, USA) with flowering brittlebush, cacti and Newman Peak in the background. March 2020.
    22078-D.jpg
  • Whale Shark (Rhincodon typus) on display at Georgia Aquarium, Atlanta, USA in April 2009.
    35419-D.jpg
  • Organ Pipe Cactus National Monument, southern Arizona, USA.  Nikon D850, 24-70mm @ 24mm, f8, 1/2000sec, ISO400, Aperture priority.
    Saguaros (22048-D).jpg
  • Cinnamon Teal (Anas cynaoptera) from Arizona, USA
    43207-D.jpg
  • Common Teal (Anas crecca carolinensis) from Phoenix, Arizona, USA
    43205-D.jpg
  • Male Mandarin Duck (Aix galericulata) from Wildlife World Zoo, Phoenix, Arizona, USA
    43202-D.jpg
  • Landscape close to Organ Pipe National Monument, southern Arizona, USA
    22076-D.jpg
  • Two Sagoaros in Organ Pipe National Monument, southern Arizona, USA
    22077-D.jpg
  • Landscape close to Organ Pipe National Monument, southern Arizona, USA
    22075-D.jpg
  • Saguaro moon. Lake Pleasant Regional Park, Arizona, USA
    22071-D.jpg
  • Overlooking Lake Pleasant, Arizona, USA
    22068-D.jpg
  • Desert landscape close to Organ Pipe Cactus National Monument, southern Arizona, USA
    22065-D.jpg
  • Tracking on horseback through the desert of The Superstitions, southern Arizona, USA
    23024-D.jpg
  • Close up of a barrel cactus (Fereocactus sp.) from southern Arizona, USA
    11101-D.jpg
  • Landscape in The Superstitions, southern Arizona, USA
    22017-D.jpg
  • Landscape in The Superstitions, southern Arizona, USA
    22016-D.jpg
  • Female Mandarin Duck (Aix galericulata) from Wildlife World Zoo, Phoenix, Arizona, USA
    43183-D.jpg
  • Saguaro cacti (Carnegiea gigantea) from Sonora Desert, Arizona, USA
    11030-D.jpg
  • Saguaro cactus (Carnegiea gigantea) silhouette. Sonora Desert, Arizona, USA.
    11031-D.jpg
  • Theodor Roosevelt Lake, Tonto National Forest, Arizona, USA.
    22114-D.jpg
  • Four Peaks Wilderness Area (Tonto National Forest, Arizona, USA) with Four Peaks in the background.
    22107-D.jpg
  • Two young American black bears (Ursus americanus) climbing tree and fighting  at Bearizona, Arizona, USA. (Controlled conditions).
    56653-D.jpg
  • Two young American black bears (Ursus americanus) climbing tree and fighting at Bearizona, Arizona, USA. (Controlled conditions).
    56652-D.jpg
  • Desert lupines, (Lupinus sparsiflorus) in Pichaco Peak State Park (Arizona, USA) in March 2020.
    11228-D.jpg
  • Desert lupine, (Lupinus sparsiflorus) in Pichaco Peak State Park (Arizona, USA) in March 2020.
    11229-D.jpg
  • Rosy-faced love bird (Agapornis roseicollis). Photo from Phoenix, Arizona (USA) where a population originating from escaped captivated birds has been established.
    44195-D.jpg
  • Desert shrubs, blue palo verde, brittle brush and a young saguaro cactus in  Picacho Peak State Park (Arizona, USA). March 2020.
    22104-D.jpg
  • Blooming desert with large population of "golden poppies" and "desert lupines" at Picacho Peak State Park (Arizona, USA) in March 2020.
    22100-D.jpg
  • Blooming desert with large population of "desert lupine" at Picacho Peak State Park (Arizona, USA) in March 2020.
    22099-D.jpg
  • Blooming desert with "desert lupine" and "golden popies" at Picacho Peak State Park (Arizona, USA) in March 2020.
    22097-D.jpg
  • Blooming desert with large population of "desert lupine" (Lupinus sparsiflorus) at Picacho Peak State Park (Arizona, USA) in March 2020.
    22094-D.jpg
  • Blooming desert at Picacho Peak State Park (Arizona, USA) in March 2020.
    22092-D.jpg
  • Desert landscape from Picacho Peak State Park (Arizona, USA) in March 2020. In the background is Newman Peak.
    22088-D.jpg
  • Desert landscape from Picacho Peak State Park (Arizona, USA) in March 2020.
    22085-D.jpg
  • Whale Shark (Rhincodon typus) on display at Georgia Aquarium, Atlanta, USA in April 2009.
    35418-D.jpg
  • Georgia Aquarium, Atlanta, USA.  Nikon D300, 24-70mm @ 24mm (36mm in full frame), f2.8, 1/60sec, ISO640, Manual
    Whale Shark (35419-D).jpg
  • Saguaro cactus from Phoenix, Arizona, USA
    11123-D.jpg
  • Landscape close to Organ Pipe National Monument, southern Arizona, USA
    22074-D.jpg
  • Picketpost Mountain in Tonto National Forest, Arizona, USA
    22063-D.jpg
  • Flowers on the Desert Christmas Cactus (Cylindropuntia leptocaulis), southern Arizona, USA
    11102-D.jpg
  • Landscape in The Superstitions, southern Arizona, USA
    22019-D.jpg
  • Landscape in The Superstitions, southern Arizona, USA
    22018-D.jpg
  • Saguaro cacti (Carnegiea gigantea) from Sonora Desert, Arizona, USA
    11032-D.jpg
  • Western Bluebird (Sialia mexicana) from Grand Canyon, Arizona, USA
    41470-D.jpg
  • Black-chinned Hummingbird (Archilochus alexandri) female. Phoenix, Arizona, USA.
    41465-D.jpg
  • Black-chinned Hummingbird (Archilochus alexandri) female. Phoenix, Arizona, USA.
    41468-D.jpg
  • Young American black bear (Ursus americanus) climbing tree at Bearizona, Arizona, USA. (Controlled conditions).
    56654-D.jpg
  • Desert lupines, (Lupinus sparsiflorus) and saguaro cactus in Pichaco Peak State Park (Arizona, USA) in March 2020.
    22102-D.jpg
  • Desert landscape with prickly pear and saguero cacti from Picacho Peak State Park (Arizona, USA) in March 2020.
    22087-D.jpg
  • Brittle bush (Encelina farinosa) from Picacho Peak State Park (Arizona, USA) in March 2020.
    11227-D.jpg
  • Desert landscape around Boyce Thompson Arboreum, southern Arizona, USA
    22021-D.jpg
  • Weedy Seadragon, Phyllopteryx taeniolatus, from Georgia Aquarium, Atlanta, USA (2009).
    35291-D.jpg
  • Western Bluebird (Sialia mexicana) from Grand Canyon, Arizona, USA
    41473-D.jpg
  • Western Bluebird (Sialia mexicana) from Grand Canyon, Arizona, USA
    41469-D.jpg
  • Black-chinned Hummingbird (Archilochus alexandri) female. Phoenix, Arizona, USA.
    41466-D.jpg
  • The Superstitions, southern Arizona, USA. Nikon D850, 24-70mm @ 31mm, f5, EV+1.33, 1/160sec, ISO2000, Aperture priority, Tone mapping
    Praying Hands Formation (22026-D).jpg
  • Hanging chain cholla (Cylindropuntia fulgida) and Saguaros from Organ Pipe Cactus National Monument, southern Arizona.
    11127-D.jpg
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Alf J. Nilsen Natural History images

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