Nick Upton / Downy birch (Betula pubescens) trees in mixed woodland, the tree on the left houses a Siberian flying squirrel (Pteromys volans) nest hole. Near Lisaku, Estonia. April.
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Nick Upton / Mixed wet woodland including Aspen (Populus tremula) and Downy birch (Betula pubescens). Inhabited by a surviving population of Siberian flying squirrel (Pteromys volans). Near Lisaku, Estonia. April...
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Nick Upton / Siberian flying squirrel (Pteromys volans) entering nest hole in Downy birch (Betula pubescens) tree trunk. Mature mixed forest, near Lisaku, Ida Virumaa, Estonia. April.
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Staffan Widstrand / Waterfall through Mountain birch (Betula pubescens tortuosa) zone in autumn. Dovrefjell National Park, Norway. September 2018.
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Staffan Widstrand / River through Mountain birch (Betula pubescens tortuosa) zone in autumn. Dovrefjell National Park, Norway. September 2018.
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Staffan Widstrand / Waterfalls through Mountain birch (Betula pubescens tortuosa) zone in autumn. Dovrefjell National Park, Norway. September 2018.
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Andy Sands / Downy birch (Betula pubescens) left standing among 2nd year coppice re-growth, an ancient woodland indicator species in UK, Suffolk, England, UK, May
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Erlend Haarberg / Yellow-coloured Mountain birch (Betula pubescens) forest with snow-covered mountain tops in the background. Rondane National Park, Norway. September.
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Erlend Haarberg / Moose (Alces alces) male in Mountain birch (Betula pubescens) forest in autumn. Fjell, Norway. September.
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Erlend Haarberg / Yellow-coloured Mountain birch (Betula pubescens) trees lit by early morning light.Grimsdalen, Fjell, Norway.
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Erlend Haarberg / Yellow-coloured Mountain birch (Betula pubescens) forest with snow-covered mountain tops in the background. Fjell, Norway. September Grimsdalen, Fjell, Norway. September 2018.
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David Woodfall / Downy birch (Betula pubescens) growing alongside River Carron, Alladale Rewilding project, Scottish Highlands, UK, October.