Jim Brandenburg / Paper Birch (Betula papyrifera) bark peeling, Minnesota

Jim Brandenburg / Paper Birch (Betula papyrifera) bark peeling, Listening Point, Ely, Minnesota

Ernie Janes / Paper / Canoe Birch (Betula papyifera) shedding bark, USA

Rob Cousins / Paper birch (Betula papyrifera), close up of bark, Westonbirt Arboretum, Gloucestershire, UK, October

Matthias Breiter / Paper Birch (Betula papyrifera) catkins, Lost Coast near Dry Bay, Glacier Bay National Park, Alaska

Jerry Monkman / Hobblebush (Viburnum lantanoides) in flower beside Paper birch tree and stream on Appalachian Trail, Crocker Mountain, Stratton, Maine, USA, May 2010

Jerry Monkman / Two men hiking through a Paper birch forest on the Appalachian Trail, Crocker Mountain, Stratton, Maine, USA, Model released, May 2010

Doug Wechsler / Paper birch stand (Betula papyrifera). Nova Scotia, Canada. August

Jim Brandenburg / Paper Birch (Betula papyrifera) leaves just opening up during early spring rain, Superior National Forest, northern Minnesota

Neil Lucas / Birch tree woodland (Betula papyrifera) in winter, with recent snow fall, Minnesota, USA, March 2008

Neil Lucas / American white / Paper birch trees (Betula papyrifera) woodland in snow, Northern Minnesota, USA March 2008

Scott Leslie / Paper Birch (Betula papyrifera) and Sugar Maple (Acer saccharum) saplings, Cape Breton Highlands National Park, Nova Scotia, Canada

Jerry Monkman / Bunchberry {Cornus canadensis} flowering beside a fallen Paper birch tree, Ellsworth, Maine, USA. June 2008

Philippe Clement / Paper / American white / Canoe birch (Betula papyrifera) leaf in autumn colour, native to northern North America

Philippe Clement / Paper / American white / Canoe birch (Betula papyrifera) leaves in autumn colours showing colour change, native to northern North America

Philippe Clement / Paper / American white / Canoe birch (Betula papyrifera) leaf in autumn colour, native to northern North America

Jerry Monkman / Paper birch trees {Betula papyrifera} on the Jessup Path, Acadia National Park, Maine, USA

Scott Leslie / Paper Birch (Betula papyrifera) bark peeling, Cape Breton Highlands National Park, Nova Scotia, Canada

Thomas Lazar / Paper Birch (Betula papyrifera) forest, Twelve mile beach, Pictured Rocks National Lakeshore, Lake Superior, Upper Peninsula, Michigan, USA

Rob Tilley / Frost on fallen Paper Birch Leaf, Washington, USA

Larry Michael / Close-up of bark of Paper Birch {Betula papyrifera} USA

Doug Wechsler / Close up of bark of Paper birch tree {Betula papyrifera} USA

GEORGETTE DOUWMA / Paper birch catkins {Betula papyrifera} from USA, Kew Gardens, London

Philippe Clement / Close up of trunk of Paper / White birch tree {Betula papyrifera} Denali NP, Alaska, USA.

Philippe Clement / Close up of trunk of Paper / White birch tree {Betula papyrifera} Denali NP, Alaska, USA.

Philippe Clement / Bark of Paper birch tree {Betula papyrifera} with Hooded lichen {Physcia adscendens} Denali NP, Alaska, USA.

Jim Brandenburg / Paper Birch (Betula papyrifera) forest, Minnesota

Jim Brandenburg / Paper Birch (Betula papyrifera) forest with autumn colors, Minnesota

Jim Brandenburg / Paper Birch (Betula papyrifera) peeling bark in forest, White Mountains National Park, New Hampshire

Jim Brandenburg / Paper Birch (Betula papyrifera) bark, Minnesota