SCOTLAND: The Big Picture / Young Aspen trees (Populus tremula) in a polytunnel at Trees For Life's nursery on Dundreggan Estate, Scotland, UK, June.
01614855
Sven Zacek / Ural owl (Strix uralensis) female on nest in old Aspen (Populus tremula) tree. Tartumaa, Southern Estonia. April.
01618155
SCOTLAND: The Big Picture / Aspen (Populus tremula) saplings to be used in Caledonian Pine Forest habitat restoration. Trees for Life nursery, Dundreggan Conservation Estate, Dumfries and Galloway, Scotland, UK.
01613915
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...
01613891
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...
01613890
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...
01613887
Nick Upton / Lisaku Park Forest from above, a mix of mature Fir (Abies sp) trees, Birch (Betula sp) and Eurasian aspen (Populus tremula). Forest host to Siberian flying squirrel (Pteromys volans). Estonia, April 2...
01613928
Nick Upton / Siberian flying squirrel (Pteromys volans) caught in emergence trap over nest hole entrance in Aspen (Populus tremula) tree. Muraka Forest Reserve, near Lisaku, Estonia. April.
01613921
Nick Upton / Laptop screen showing trailcam footage of Siberian flying squirrel (Pteromys volans) returning to nest hole in Aspen (Populus tremula) tree. Near Lisaku, Estonia. April 2018.
01613917
Nick Upton / Felled Aspen (Populus tremula) trees with tit nests in hollows. Treeholes suitable for Siberan flying squirrel (Pteromys volans). Near Lisaku, Estonia. April 2018.
01613897
Nick Upton / Siberian flying squirrel (Pteromys volans) emergence trap over entrance to nest hole in old Aspen tree (Populus tremula). Muraka Forest Reserve, near Lisaku, Estonia. April 2018.
01613888
Nick Upton / Lisaku Park Forest from above, a mix of mature Fir (Abies sp) trees, Birch (Betula sp) and Eurasian aspen (Populus tremula). Forest host to Siberian flying squirrel (Pteromys volans). Estonia, April 2...
01613918
Nick Upton / Felled Aspen (Populus tremula) trees with tit nests in hollows. Treeholes suitable for Siberan flying squirrel (Pteromys volans). Near Lisaku, Estonia. April 2018.
01613914
Nick Upton / Eurasian aspen (Populus tremula) catkins, major food souce for Siberian flying squirrel (Pteromys volans). Lisaku Park Forest, Estonia. April.
01613913
Nick Upton / Interior of a nest box used by Siberian flying squirrel (Pteromys volans) with stored Aspen (Populus tremula) catkins. Estonia. April.
01613909
Nick Upton / Researcher reviewing trailcam footage on laptop of Siberian flying squirrel (Pteromys volans) emerging from nest hole in Aspen (Populus tremula) tree at night. Mature mixed forest, near Lisaku, Estoni...
01613903
Nick Upton / Researcher face to face with Siberian flying squirrel (Pteromys volans) whilst setting trap on old Aspen (Populus tremula) tree. Muraka Forest Reserve, near Lisaku, Estonia. April 2018. Model released...
01613892
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...
01613883
Nick Upton / Siberian flying squirrel (Pteromys volans) fitted with radiocollar on Aspen (Populus tremula) trunk near nest hole. Mature mixed forest, near Lisaku, Estonia. April 2018.
01613884
Nick Upton / Siberian flying squirrel (Pteromys volans) peering out of nest hole in old Aspen (Populus tremula) tree. Mature mixed forest, near Lisaku, Estonia. April.
01613907
Nick Upton / Researcher inspecting a Siberian flying squirrel (Pteromys volans) caught in trap on old Aspen (Populus tremula) tree with occupied nest hole. Muraka Forest Reserve, near Lisaku, Estonia. April 2018....
01601758
Mike Read / Insh Marshes RSPB reserve and Aspen (Populus tremula) Strathspey, Highland Region, Scotland, March.
01582414
Juan Carlos Munoz / Leaves of a Common aspen tree (Populus tremula) on a path in autumn, Aragon, Spain, November.
01582413
Juan Carlos Munoz / Leaves of a Common aspen tree (Populus tremula) on ground in autumn, Aragon, Spain, November.
01573424
SCOTLAND: The Big Picture / Falls of Truim running through autumnal woodland, Cairngorms National Park, Scotland, UK, October 2016.
01573423
SCOTLAND: The Big Picture / Falls of Truim running through autumnal woodland, Cairngorms National Park, Scotland, UK, October 2016.
01553135
SCOTLAND: The Big Picture / River Cannich in autumn with fallen Aspen (Populus tremula) leaves, Highlands, Scotland, UK, October 2015.
01553134
SCOTLAND: The Big Picture / Abstract of Aspen (Populus tremula) leaves floating on River Cannich, Highlands, Scotland, UK, October 2015.
01553133
SCOTLAND: The Big Picture / Aspen (Populus tremula) leaves floating on River Cannich, Highlands, Scotland, UK, October 2015.
01470103
Wild Wonders of Europe / Widstrand / Taiga forest with Scots pine (Pinus sylvestris) Aspen (Populus tremula) and Mountain birch (Betula pubescens tortuosa) trees, Saltoluokta area, Greater Laponia Rewilding Area, Lapland, Norrbotten, Swe...
01738932
Pal Hermansen / Aspen (Populus tremula) tree in snow, with trunk gnawed by Beaver (Castor fiber), Follo, Viken, Norway. December.
01718430
Kirkendall-Spring / Aspen (Populus tremula) trees, Grand Teton National Park, Wyoming, USA. September.
01709541
Orsolya Haarberg / Aspen (Populus tremula) forest with yellow foliage in autumn, Boverdalen valley, Innlandet, Norway. October.
01709538
Orsolya Haarberg / Norway spruce (Picea abies) and Aspen (Populus tremula) in mixed forest, Ottadalen, Innlandet, Norway. September, 2019.
01709537
Orsolya Haarberg / Scots pine (Pinus sylvestris) plantation shrouded in fog with some colorful Aspen (Populus tremula) trees, Sel, Innlandet, Norway. September.
01698087
SCOTLAND: The Big Picture / Specially grafted Aspen (Populus tremula) trees that are artifically stressed to encourage the production of catkins and seeds that can be used to propagate aspen saplings, Dundreggan Tree Nursery, S...
01698050
SCOTLAND: The Big Picture / Aspen (Alnus sp.) and Scots pines (Pinus sylvestris) woodland in autumn, Abernethy Forest, Cairngorms National Park, Scotland, UK. October.
01688035
Guy Edwardes / Autumn coloured Aspen (Populus tremula) in broadleaf woodland, Rhodope Mountains, Bulgaria. October.
01678688
Alex Hyde / Leaf of Aspen (Populus tremula) and needles of Scots pine (Pinus sylvestris) on red Sphagnum Moss (Sphagnum sp.). Glen Affric, Scotland, UK. October.
01678687
Alex Hyde / Leaf of Aspen (Populus tremula) and needles of Scots pine (Pinus sylvestris) on red Sphagnum Moss (Sphagnum sp.). Glen Affric, Scotland, UK. October.
01670284
Jussi Murtosaari / Aspen (Populus tremula) growing on rock in woodland. Hyyppaanvuori, Finland. October.
01670152
Jussi Murtosaari / Eurasian aspen (Populus tremula) tree trunk with swollen burr growth. Jyvaskyla, Finland. April.
