Shattil & Rozinski / Swirling leaves of Aspen tree {Populus tremula} floating on water surface in autumn, USA
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Sven Zacek / Ural owl (Strix uralensis) perched in Aspen tree in summer. Tartumaa county, Southern Estonia. May.
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Jeff Foott / Beaver (Castor canadensis) feeding on Aspen, Grand Teton National Park, Wyoming, USA, August.
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Mike Read / Insh Marshes RSPB reserve and Aspen (Populus tremula) Strathspey, Highland Region, Scotland, March.
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Danny Green / Beaver kits (Castor fiber) eating aspen, Finland, July
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Danny Green / Beaver (Castor fiber) kits eating aspen, Finland, July.
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Kirkendall-Spring / Aspen trees and Mount Moran from Ox Bow Bend on Snake River, Grand Teton National Park, Wyoming, USA. September 2015.
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Kirkendall-Spring / Autumn colours below Mount Moran, Grand Teton National Park, Wyoming, USA. September 2015.
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Kirkendall-Spring / Sun illuminating Aspen trees on Green River Lakes, Bridger Wilderness, Bridger national Forest, Wyoming, USA. September 2015.
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Sven Zacek / Moose (Alces alces) eating fresh leaves of young Aspen trees, Tartumaa, Estonia, May.
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David Noton / Quaking aspen trees (Populus tremuloides) and conifers with dusting of snow, Dome Hill above Dawson City, Yukon Territories, Canada, September 2013.
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David Noton / Bove Island with autumnal Quaking aspen (Populus tremuloides) in Tagish Lake, Yukon Territories, Canada, September 2013.
