Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull with aspens, western Alberta, Canada
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Donald M. Jones / Elk (Cervus elaphus) bull bugling, Jasper National Park, Alberta, Canada
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Donald M. Jones / Elk (Cervus elaphus) bull bugling, Jasper National Park, Alberta, Canada
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Donald M. Jones / Elk (Cervus elaphus) bull with females in forest, Jasper National Park, Alberta, Canada
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Peter Cairns / naturepl.com / Aspen trees felled by European beaver (Castor Fibor), Sweden, April 2008
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Peter Cairns / naturepl.com / Aspen trees felled by European beaver (Castor Fibor), Sweden, April 2008
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Laurie Campbell / European beavers {Castor fiber} feeding on Aspen at the Aigas Field Studies Centre, European Beaver demonstration project, Inverness-shire, Scotland, May 2008
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Laurie Campbell / European beavers {Castor fiber} feeding on Aspen at the Aigas Field Studies Centre, European Beaver demonstration project, Inverness-shire, Scotland, May 2008
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Laurie Campbell / European beavers {Castor fiber} feeding on Aspen at the Aigas Field Studies Centre, European Beaver demonstration project, Inverness-shire, Scotland, May 2008
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Laurie Campbell / European beaver {Castor fiber} feeding on Aspen at the Aigas Field Studies Centre, European Beaver demonstration project, Inverness-shire, Scotland, May 2008
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Laurie Campbell / European beavers {Castor fiber} feeding on Aspen at the Aigas Field Studies Centre, European Beaver demonstration project, Inverness-shire, Scotland, May 2008
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull eating Quaking Aspen (Populus tremuloides) bark in winter, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) chew marks on bark of Quaking Aspen (Populus tremuloides), western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull bedded in background and elk chews on Quaking Aspen (Populus tremuloides) bark in foreground, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) chew marks on bark of Quaking Aspen (Populus tremuloides), western Montana
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Yva Momatiuk & John Eastcott / Quaking Aspen (Populus tremuloides) tree trunk with elk antler rubs, Grand Teton National Park, Wyoming
