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  • Four Peaks (Tonto National Park), Arizona, USA
    22120-D.jpg
  • Sunset in Tonto National Park, Arizona, USA
    22121-D.jpg
  • Desert vegetation with several saguaros (Carnegiea gigantea) in Saguaro National Park, southern Arizona, USA
    22118-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
  • Rosy-billed Pochard (Netta peposaca) from Arizona, USA
    43206-D.jpg
  • Hanging chain cholla (Cylindropuntia fulgida) from Organ Pipe Cactus National Monument, southern Arizona.
    11125-D.jpg
  • Nichol's hedgehog cactus (Echinocereus nicholii) from Organ Pipe Cactus National Monument, Arizona.
    11118-D.jpg
  • Organ Pipe National Monument, southern Arizona, USA
    22072-D.jpg
  • Beautiful and diverse desert landscape from The Superstitions, southern Arizona
    22059-D.jpg
  • Forest of Saguaros in Organ Pipe Cactus National Monument, southern Arizona
    22061-D.jpg
  • Beautiful desert landscape from The Superstitions, southern Arizona
    22060-D.jpg
  • Spectacular desert landscape with giant Saguaro cacti  in Organ Pipe Cactus National Monument, southern Arizona.
    22053-D.jpg
  • Morning in Organ Pipe Cactus National Monument, southern Arizona.
    22038-D.jpg
  • Tracking on horseback through the desert of The Superstitions, southern Arizona, USA
    22023-D.jpg
  • Four Peaks (Tonto National Park), Arizona, USA
    22119-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
  • American flamingo (Phoenicopterus ruber) from Wildlife World Zoo, Phoenix, ASrizona, USA
    43210-D.jpg
  • Organ Pipe cactus (Stenocereu thurberi) from organ Pipe cactus National Monument, southern Arizona.
    11131-D.jpg
  • Organ Pipe cactus (Stenocereu thurberi) from organ Pipe cactus National Monument, southern Arizona.
    11128-D.jpg
  • Hanging chain cholla (Cylindropuntia fulgida) from Organ Pipe Cactus National Monument, southern Arizona.
    11126-D.jpg
  • Hanging chain cholla (Cylindropuntia fulgida) from Organ Pipe Cactus National Monument, southern Arizona.
    11124-D.jpg
  • Most likely violet prickly pear (Opuntia gosseliniana) from the desert at Picketpost Mountain, The Superstitions, Arizona.
    11116-D.jpg
  • Purple Prickly Per (Opuntia macrocenta) in the desert at Picketpost Mountain, The Superstitions, Arizona
    11114-D.jpg
  • Large and very old saguaro cacti at Picketpost Mountain, The Superstitions, Arizona
    11109-D.jpg
  • Large and very old saguaro cacti at Picketpost Mountain, The Superstitions, Arizona
    11110-D.jpg
  • Landscape close to Organ Pipe National Monument, southern Arizona, USA
    22076-D.jpg
  • Landscape close to Organ Pipe National Monument, southern Arizona, USA
    22075-D.jpg
  • Organ Pipe National Monument, southern Arizona, USA
    22073-D.jpg
  • A giant and very old Saguaro cactus in Lake Pleasant Regional Park, close to Phoenix, Arizona
    22070-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
  • Desert landscape close to Organ Pipe Cactus National Monument, southern Arizona, USA
    22065-D.jpg
  • Large specimen of Engelmann's Prickley Pear (Opuntia engelmannii) from Organ Pipe Cactus National Monument, southern Arizona.
    22062-D.jpg
  • Back lit desert landscape with many species of cacti  in Organ Pipe Cactus National Monument, southern Arizona.
    22057-D.jpg
  • Back lit desert landscape with many species of cacti  in Organ Pipe Cactus National Monument, southern Arizona.
    22056-D.jpg
  • Back lit desert landscape with many species of cacti  in Organ Pipe Cactus National Monument, southern Arizona.
    22055-D.jpg
  • Back lit desert landscape with many species of cacti  in Organ Pipe Cactus National Monument, southern Arizona.
    22054-D.jpg
  • Beautiful and very old specimens of Saguaro cacti (Carnegiea gigantea) in Organ Pipe Cactus National Monument, southern Arizona.
    22048-D.jpg
  • Vegetation and road in Organ Pipe Cactus National Monument, southern Arizona
    22047-D.jpg
  • Storm building up  in Organ Pipe Cactus National Monument, southern Arizona.
    22045-D.jpg
  • Vegetation and road in Organ Pipe Cactus National Monument, southern Arizona
    22046-D.jpg
  • Storm building up  in Organ Pipe Cactus National Monument, southern Arizona.
    22044-D.jpg
  • Morning in Organ Pipe Cactus National Monument, southern Arizona.
    22037-D.jpg
  • Morning in Organ Pipe Cactus National Monument, southern Arizona.
    22035-D.jpg
  • Morning in Organ Pipe Cactus National Monument, southern Arizona.
    22036-D.jpg
  • Morning in Organ Pipe Cactus National Monument, southern Arizona.
    22032-D.jpg
  • Elvis Chapel in the Superstition Mountains, southern Arizona
    22029-D.jpg
  • Elvis Chapel in the Superstition Mountains, southern Arizona
    22028-D.jpg
  • Tracking on horseback through the desert of The Superstitions, southern Arizona, USA
    22025-D.jpg
  • Desert vegetation with several saguaros (Carnegiea gigantea) in Saguaro National Park, southern Arizona, USA
    22116-D.jpg
  • American flamingo (Phoenicopterus ruber) from Wildlife World Zoo, Phoenix, ASrizona, USA
    43209-D.jpg
  • Close up of the Organ Pipe cactus (Stenocereu thurberi) from organ Pipe cactus National Monument, southern Arizona.
    11129-D.jpg
  • Purple Prickly Per (Opuntia macrocenta) in the desert at Picketpost Mountain, The Superstitions, Arizona
    11113-D.jpg
  • Spines on a Saguaro cactus (Carnegiea gigantea) can grow up to one mm a day. Photo from The Superstitions, Arizona.
    11112-D.jpg
  • Gigantic and very old saguaro cactus in the desert close to Picketpost Mountain, The Superstitions, Arizona.
    11108-D.jpg
  • Two Sagoaros in Organ Pipe National Monument, southern Arizona, USA
    22077-D.jpg
  • Overlooking Lake Pleasant, Arizona, USA
    22068-D.jpg
  • Spectacular desert landscape with many species of cacti  in Organ Pipe Cactus National Monument, southern Arizona.
    22052-D.jpg
  • Back lit desert landscape with many species of cacti  in Organ Pipe Cactus National Monument, southern Arizona.
    22051-D.jpg
  • Back lit desert landscape with many species of cacti  in Organ Pipe Cactus National Monument, southern Arizona.
    22050-D.jpg
  • Beautiful and very old specimens of Saguaro cacti (Carnegiea gigantea) in Organ Pipe Cactus National Monument, southern Arizona.
    22049-D.jpg
  • A shaded valley in Organ Pipe Cactus National Monument, southern Arizona.
    22043-D.jpg
  • Giant Saguaros in Organ Pipe Cactus National Monument, southern Arizona.
    22041-D.jpg
  • Giant Saguaros in Organ Pipe Cactus National Monument, southern Arizona.
    22042-D.jpg
  • Giant Saguaros in the morning light of Organ Pipe Cactus National Monument, southern Arizona.
    22040-D.jpg
  • Morning in Organ Pipe Cactus National Monument, southern Arizona.
    22039-D.jpg
  • Morning in Organ Pipe Cactus National Monument, southern Arizona.
    22034-D.jpg
  • Morning in Organ Pipe Cactus National Monument, southern Arizona.
    22033-D.jpg
  • Sunrize in Organ Pipe Cactus National Monument, southern Arizona.
    22031-D.jpg
  • Tracking on horseback through the desert of The Superstitions, southern Arizona, USA
    23024-D.jpg
  • Desert vegetation with several saguaros (Carnegiea gigantea) in Saguaro National Park, southern Arizona, USA
    22117-D.jpg
  • Organ Pipe cactus (Stenocereu thurberi) from organ Pipe cactus National Monument, southern Arizona.
    11130-D.jpg
  • Engelmann prickly pear (Opuntia engelmannii) from the desert at Picketpost Mountain, The Superstitions, Arizona.
    11115-D.jpg
  • Landscape close to Organ Pipe National Monument, southern Arizona, USA
    22074-D.jpg
  • Saguaro moon. Lake Pleasant Regional Park, Arizona, USA
    22071-D.jpg
  • Hiking in Lake Pleasant Regional Park close to Phoenix, Arizona.
    22069-D.jpg
  • Beautiful and diverse desert landscape from The Superstitions, southern Arizona
    22058-D.jpg
  • Sunrize in Organ Pipe Cactus National Monument, southern Arizona.
    22030-D.jpg
  • A young American black bear (Ursus americanus) climbing tree at Bearizona, Arizona, USA. (Controlled conditions).
    56655-D.jpg
  • Sunset in The Superstitions, Arizona
    22001-D.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.
    22113-D.jpg
  • View from Four Peaks Wilderness Area (Tonto National Forest) towards Usery Mountain Regional Park, Arizona, USA.
    22110-D.jpg
  • A young American black bears (Ursus americanus) climbing tree at Bearizona, Arizona, USA. (Controlled conditions).
    56656-D.jpg
  • Three young American black bears (Ursus americanus) climbing trees at Bearizona, Arizona, USA. (Controlled conditions).
    56651-D.jpg
  • Two young American black bears (Ursus americanus) climbing tree and fighting at Bearizona, Arizona, USA. (Controlled conditions).
    56652-D.jpg
  • Young American black bear (Ursus americanus) climbing a tree at Bearizona, Arizona, USA. (Controlled conditions).
    56650-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 "golden poppies" and "desert lupines" at Picacho Peak State Park (Arizona, USA) in March 2020.
    22100-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 "desert lupine" at Picacho Peak State Park (Arizona, USA) in March 2020.
    22099-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. In the background is Newman Peak.
    22088-D.jpg
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Alf J. Nilsen Natural History images

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