David Noton / Autumn colours of the Aspen trees (Populus tremula) in the snow, near Muleshoe, Bow Valley Parkway, Banff National Park, Alberta, Canada. October 2009
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David Noton / Autumn colours of the Aspen trees (Populus tremula) in the snow, near Muleshoe, Bow Valley Parkway, Banff National Park, Alberta, Canada. October 2009
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David Noton / Autumn colours of the Aspen trees (Populus tremula) in the snow, near Muleshoe, Bow Valley Parkway, Banff National Park, Alberta, Canada. October 2009
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Shattil & Rozinski / Quaking aspen trees (Populus tremuloides) in autum, San Luis Valley, Colorado, USA
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Shattil & Rozinski / Quaking aspen trees (Aspen tremuloides) in autumn, San Luis Valley, Colorado, USA
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Tom Vezo / Timber Wolf (Canis lupus) portrait among aspen leaves, Teton Valley, Idaho
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Gerry Ellis / Raccoon (Procyon lotor) three orphan babies, Aspen Valley, Ontario, Canada
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Gerry Ellis / Red Fox (Vulpes vulpes) kit in log, Aspen Valley, Ontario, Canada
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Gerry Ellis / Red Fox (Vulpes vulpes) kit in log, Aspen Valley, Ontario, Canada
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David Noton / Mist filled valley of the Yukon River at dawn, near Dawson City, Dome Hill, Yukon Territories, Canada, September 2013.
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David Noton / Mist filled valley of the Yukon River at dawn, near Dawson City, Dome Hill, Yukon Territories, Canada, September 2013.
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David Noton / Mist filled valley of the Yukon River at dawn, near Dawson City, Dome Hill, Yukon Territories, Canada, September 2013.
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Tim Fitzharris / Quaking Aspen (Populus tremuloides) forest in autumn, Snowmass Mountain near Quaking Aspen, Colorado
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David Noton / Autumn colours of the Aspen trees (Populus tremula) and conifers in the snow, near Muleshoe, Bow Valley Parkway, Banff National Park, Alberta, Canada. October 2009
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David Noton / Autumn colours of the Aspen trees (Populus tremula) in the snow, near Muleshoe, Bow Valley Parkway, Banff National Park, Alberta, Canada. October 2009
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Shattil & Rozinski / Quaking aspen (Populus trembloides) leaves in stream, San Luis Valley, Colorado, USA
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Shattil & Rozinski / Quaking aspen (Populus tremuloides) leaves above a stream, San Luis Valley, Colorado, USA
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Shattil & Rozinski / Quaking aspen trees (Populus tremuloides) in autumn, San Luis Valley, Colorado, USA
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Shattil & Rozinski / Fallen Aspen leaves {Populus tremula} on rock in river, San Luis Valley, Colorada, USA
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Tom Vezo / Timber Wolf (Canis lupus) portrait among Aspen trees, Teton Valley, Idaho
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Tom Vezo / Timber Wolf (Canis lupus) portrait among Aspen trees, Teton Valley, Idaho
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Tom Vezo / Timber Wolf (Canis lupus) portrait amid Aspen leaves, Teton Valley, Idaho
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Gerry Ellis / American Beaver (Castor canadensis) near water, Aspen Valley, Ontario, Canada
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Daniel J. Cox / Quaking Aspen (Populus tremuloides) trees and mountains in autumn, Maroon Lake, Maroon Bells Snowmass Wilderness Area, Colorado
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Daniel J. Cox / Quaking Aspen (Populus tremuloides) trees and mountains in autumn, Maroon Lake, Maroon Bells Snowmass Wilderness Area, Colorado
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Daniel J. Cox / Quaking Aspen (Populus tremuloides) trees and mountains in autumn, Maroon Lake, Maroon Bells Snowmass Wilderness Area, Colorado
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TOM MANGELSEN / Quaking aspens and grasses turn golden as an autumn storm darkens the sky above Lamar Valley in Yellowstone National Park, Wyoming. [SCAN]
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TOM MANGELSEN / Aspen (Populus sp.) trees standing on a hillside in snow, backlit by sun breaking through clouds, Lamar Valley, Yellowstone National Park, Wyoming, USA. February.
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Orsolya Haarberg / Aspen (Populus tremula) forest with yellow foliage in autumn, Boverdalen valley, Innlandet, Norway. October.
![Quaking aspens and grasses turn golden as an autumn storm darkens the sky above Lamar Valley in Yellowstone National Park, Wyoming. [SCAN]](http://nplimages.infradoxxs.com/cache/tcache/01740211.jpg "Quaking aspens and grasses turn golden as an autumn storm darkens the sky above Lamar Valley in Yellowstone National Park, Wyoming. [SCAN]")
