Tony Wu / Siberian flying squirrel (Pteromys volans orii) emerging from nest hole in tree at dusk. Hokkaido, Japan. March.
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Tony Wu / Siberian flying squirrel (Pteromys volans orii) eating buds in tree. Hokkaido, Japan. March.
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Tony Wu / Siberian flying squirrel (Pteromys volans orii) feeding on Sakhalin fir tree. Hokkaido, Japan. March.
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Tony Wu / Siberian flying squirrel (Pteromys volans orii) sitting in tree at dusk. Hokkaido, Japan. March.
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Tony Wu / Siberian flying squirrel (Pteromys volans orii) emerging from nest hole in tree trunk. Hokkaido, Japan. March.
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Nick Upton / Felled conifer trees stacked beside forestry track through mixed forest. Near Muraka Forest Reserve, a rare surviving home for Siberian flying squirrel (Pteromys volans). Near Lisaku, Estonia. April 2...
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Nick Upton / Aspen (Populus tremula) with Aspen trunk rot / False tinder conk mushroom (Phellinus tremulae). Trees with rotten cores provide ideal nest holes for the Siberian flying squirrel (Pteromys volans). Mur...
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Nick Upton / Researcher radiotracking Siberian flying squirrel (Pteromys volans) in mature mixed forest. Muraka Forest Reseve, near Lisaku, Estonia. April 2018.
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Nick Upton / Researcher setting trailcam to monitor Siberian flying squirrel (Pteromys volans) nest hole. Mature mixed forest, near Lisaku, Estonia. April 2018. Model released.
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Nick Upton / Researcher using laptop to check trailcam footage of Siberian flying squirrel (Pteromys volans) nest box in mature mixed forest. Near Lisaku, Estonia. April 2018. Model released.
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Nick Upton / Nest box for Siberian flying squirrel (Pteromys volans) in mature mixed forest. Muraka Forest Reseve, near Lisaku, Estonia. April 2018.
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Nick Upton / Mixed wet woodland including Aspen (Populus tremula) and Downy birch (Betula pubescens). Inhabited by rare surviving Siberian flying squirrel (Pteromys volans) population. Near Lisaku, Estonia. April...
