Mark Hamblin / 2020VISION / Alder trees (Alnus hirsuta) silhouetted and reflected in River Spey in winter, Cairngorms NP, Scotland, UK, December 2010

Peter Cairns / Flooded birch and alder woodland in autumn, Cairngorms National Park, Scotland, UK, November, RUNNER UP: In Praise of Plants category of the Wildlife Photographer of the Year Competition 2010

Wild Wonders of Europe / Cairns / Great grey owl (Strix nebulosa) backlit in alder tree, Bergslagen, Sweden, June 2009

Yukihiro Fukuda / Japanese macaque / Snow monkey {Macaca fuscata} male grooming female in courtship in Japanese green alder tree {Alnus firma}, autumn, Jigokudani, Nagano, Japan

Ross Hoddinott / Common alder (Alnus glutinosa) catkins silhouetted. Cornwall. UK

Benjam Pontinen / Siberian flying squirrel feeds in alder tree. Nurmo, Finland.

Peter Cairns / 2020VISION / Mixed native woodland comprised of Silver birch (Betula pendula), Alder (Alnus hirsuta) and Rowan (Sorbus aucuparia) trees in autumn, Cairngorms National Park, Scotland, UK, October 2012.

Peter Cairns / 2020VISION / Mixed native woodland comprised of Silver birch (Betula pendula), Alder (Alnus hirsuta) and Rowan (Sorbus aucuparia) trees in autumn, Cairngorms National Park, Scotland, UK, October.

Peter Cairns / 2020VISION / Mixed native woodland comprised of Silver birch (Betula pendula), Alder (Alnus hirsuta) and Rowan (Sorbus aucuparia) trees in autumn, Cairngorms National Park, Scotland, UK, October 2012.

Peter Cairns / 2020VISION / Mixed native woodland comprised of Silver birch (Betula pendula), Alder (Alnus hirsuta) and Rowan (Sorbus aucuparia) trees in autumn, Cairngorms National Park, Scotland, UK, October.

David Woodfall / Alder (Alnus glutinosa) tree leaves new growth. Radnorshire Wildlife Trust Nature Reserve, Wales, UK, June.

Will Watson / Reflections of Grey willow (Salix cinerea) and Alder (Alnus glutinosa) trees, with exposed dead wood in a glacial kettle hole pond, Herefordshire, England, UK, Europe, November

Will Watson / Reflections of Grey willow (Salix cinerea) and Alder (Alnus glutinosa) trees, with exposed dead wood in a glacial kettle hole pond, Herefordshire, England, UK, Europe, November

Will Watson / Reflections of Grey willow (Salix cinerea) and Alder (Alnus glutinosa) trees, with exposed dead wood in a glacial kettle hole pond, Herefordshire, England, UK, Europe, November

Will Watson / Roots of Common alder (Alnus glutinosa) tree and dead wood exposed by drought in a glacial kettle hole pond, Herefordshire, England, UK, November

Will Watson / Reflections of Grey willow (Salix cinerea) and Alder (Alnus glutinosa) trees, with exposed dead wood in a glacial kettle hole pond, Herefordshire, England, UK, Europe, November

Konstantin Mikhailov / Preserved wild hilly steppe with feather-grasses and other Graminea, wormwood, sagebrush, tulips, pasqueflower, crossed with brook valleys with alder-tree groves and thick bush, Orenburgsky State Natu...

David Tipling / 2020VISION / Looking up through the canopy of woodland trees, Alder Carr, Woodwalton Fen, Cambridgeshire, UK, November

Mark Hamblin / 2020VISION / Alder trees (Alnus sirsuta) along River Spey, Cairngorms National Park, Scotland, UK, February. 2020VISION Exhibition.

Laurie Campbell / Old Alder (Alnus glutinosa) tree growing in Beinn Eighe National Nature Reserve, Wester Ross, Scotland, June

Mark Hamblin / 2020VISION / Alder trees (Alnus hirsuta) silhouetted and reflected in River Spey in winter, Cairngorms NP, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Alder trees (Alnus hirsuta) silhouetted and reflected in River Spey in winter, Cairngorms NP, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Alder trees (Alnus hirsuta) silhouetted and reflected in River Spey in winter, Cairngorms NP, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Alder sapling (Alnus hirsuta) growing in fissure in rock beside River Affric, Glen Affric, Highland, Scotland, UK, October

Peter Cairns / 2020VISION / Osprey (Pandion haliaeetus) male perched in alder tree near nest, Cairngorms NP, Highland, Scotland, UK, July

Peter Cairns / 2020VISION / Osprey (Pandion haliaeetus) male perched in alder tree near nest, Cairngorms NP, Highland, Scotland, UK, July

Peter Cairns / 2020VISION / Osprey (Pandion haliaeetus) male perched in alder tree near nest, Cairngorms NP, Highland, Scotland, UK, July

Will Watson / Oak (Quercus robur) and Alder (Alnus glutinosa) leaves reflected in pool to create a natural abstract. Herefordshire, England, November.

Peter Cairns / Flooded Birch (Betula) and Alder (Alnus) woodland in autumn. Cairngorms, Scotland, November.

Florian Möllers / Alder tree cut down by Eurasian beaver (Castor fiber albicus) on river bank of the Havel, Berlin, Germany, October 2007

Nick Upton / Young Black alder (Alnus glutinosa) tree growing on rocky shore of lake Saimaa. Near Savonlinna, Finland, August 2010.

James Christensen / Alder (Alnus sp ) forest with stream, Mount Rainier National Park, Washington

Alan Williams / Female Lesser redpoll (Carduelis flammea cabaret) perched on Alder tree branch in winter, Cheshire, UK

Colin Varndell / Leaf of the Common alder tree (Alnus hirsuta) UK, May

Laurie Campbell / Alder stump felled by European beaver {Castor fiber} but showing regeneration at the Aigas Field Studies Centre, European Beaver demonstration project, Inverness-shire, Scotland, May 2008

Wild Wonders of Europe / Cairns / Great grey owl (Strix nebulosa) perched atop alder tree, Bergslagen, Sweden, June 2009

Simon Colmer / Alder {Alnus hirsuta} leaves, UK

Rolf Nussbaumer / Lincoln's Sparrow {Melospiza / Zonotrichia lincolnii} male perched in Alder tree, Rocky Mountain National Park, Colorado, USA, June

Michael Hutchinson / Italian Alder (Alnus cordata) street tree surrounded by its catkins on pavement, Bristol, UK

Duncan Mcewan / Alder moth (Acronita alni) camouflaged on alder tree bark, UK

Brian Lightfoot / Winter sun through Alder tree (Alnus hirsuta) Scotland, UK

Benjam Pontinen / Siberian flying squirrel {Pteromys volans} feeding in Alder tree, Nurmo, Finland.

Niall Benvie / Red squirrel {Sciurus vulgaris} portrait in Alder tree, Scotland, UK.

Philippe Clement / Alder tree {Alnus hirsuta} leaves and cones, Denali NP, Alaska, USA.

Artur Tabor / Golden oriole {Oriolus oriolus} at nest in alder tree, Polesie, Poland.

PREMAPHOTOS / Alder woodwasp (Xiphydria camelus) ovipositing / laying eggs under bark of Alder tree UK.

Nigel Bean / River scene with reeds and alder tree {Alnus glutinosa} nr Bialowieza forest Poland

Duncan Mcewan / Common alder tree - male catkins and female small red inflorescences, Scotland

Duncan Mcewan / Common alder tree leaves unfurling, Scotland

Michael Quinton / Alder (Alnus fruticosa) trees girdled by Snowshoe Hare (Lepus americanus), Alaska