Andy Trowbridge / Male Goldfinch (Carduelis carduelis) perched on flowering European bird cherry (Prunus padus). Southern Norway. May.

Simon Colmer / Bird cherry (Prunus padus) buds in winter, UK

Philippe Clement / Close-up of the leaves of a Black cherry tree (Prunus serotina), with ripe and unripe fruit, Belgium, July

Philippe Clement / Close-up of the leaves of a Black cherry tree (Prunus serotina), with ripe and unripe fruit, Belgium, July

SCOTLAND: The Big Picture / Section of Bird cherry (Prunus padus) in autumn, Cairngorms National Park, Scotland, UK, October 2013.

Andy Trowbridge / Greenfinch (Carduelis chloris) perched on flowering European bird cherry (Prunus padus). Back-lit. Southern Norway. May.

Alex Hyde / Bird Cherry (Prunus padus) blossom. Peak District National Park, Derbyshire, UK. April.

Chris Mattison / Flowering bird cherry (Prunus padus), Cumbria, UK. April.

Chris Mattison / Flowering bird cherry (Prunus padus), Cumbria, UK. April.

Colin Varndell / Bird cherry (Prunus padus) flower, Dorset, UK. May

Colin Varndell / Bird Cherry (Prunus padus) twig showing swelling buds in mid-winter. Dorset, UK, January.

Colin Varndell / Bird Cherry (Prunus padus) twig showing swelling buds in mid-winter. Dorset, UK, January.

Colin Varndell / Bird Cherry (Prunus padus) in blossom. Dorset, UK, April.

Gary K. Smith / Bird Cherry (Prunus padus) in full blossom in hedgerow. Norfolk, England, April.

Konstantin Mikhailov / Bird cherry tree {Prunus padus avium} in flower, Russia, May

Martin Gabriel / Bird cherry tree (Prunus padus) in flower. Bavaria, Germany.

Martin Gabriel / Bird cherry tree (Prunus padus) flowers. Near Kelheim, Bavaria, Germany, April

Martin Gabriel / Bird cherry tree (Prunus padus) in flower, Bavaria, Germany.

Martin Gabriel / Bird cherry tree (Prunus padus) in flower, Bavaria, Germany.

Martin Gabriel / Bird cherry tree (Prunus padus) in flower. Near Kelheim, Bavaria, Germany, April

MYN / Niall Benvie / Bird cherry {Prunus padus} in flower, May, Hordaland, Norway meetyourneighbours.net project

Bengt Lundberg / Bird cherry tree {Prumus padus} covered with webs and caterpillar larvae of Ermine moth {Yponomeuta sp} Sweden

Philippe Clement / Bird cherry berries and leaves {Prunus padus} Belgium

Philippe Clement / European bird cherry tree fruit and leaves {Prunus padus} France

Jason Smalley / Bird cherry {Prunus padus} flowering, England

Bengt Lundberg / Bird cherry tree in flower {Prunus padus} Sweden

Artur Tabor / Bird cherry tree in flower {Prunus padus} Poland

Jason Smalley / Bird cherry {Prunus padus} in flower, England.

Konrad Wothe / Bird cherry (Prunus padus) fruits on tree in rain, Bavaria, Germany. June.

John Waters / Caterpillars of the Bird-cherry ermine moth (Yponomeuta evonymella) among silk strands of a huge communal web covering host tree (Prunus padus) and protecting the many pupae in their silk cocoons from...

John Waters / Caterpillar of Bird-cherry ermine moth (Yponomeuta evonymella) among silk strands of a huge communal web that covering the host tree (Prunus padus) and protecting the many pupae in silk cocoons from a...

John Waters / Communal web of Bird-cherry ermine moth (Yponomeuta evonymella) covering defoliated host tree, Bird Cherry (Prunus padus) while protecting caterpillars and pupae from predators, Bristol, UK, June.

John Waters / Detail of communal web of Bird-cherry ermine moth (Yponomeuta evonymella) which is covering host tree, Bird cherry (Prunus padus) and protecting caterpillars and pupae from predators, Bristol, UK, Jun...

John Waters / Communal web of Bird-cherry ermine moths (Yponomeuta evonymella) covering its host tree, Bird cherry (Prunus padus) and protecting caterpillars and pupae from predators, Bristol, UK, June.

Ernie Janes / Bird cherry, (Prunus padus) in flower.

Paul Harcourt Davies / Bird cherry (Prunus padus) blossom. Dolomites, Italy. June.

Linda Pitkin / Bird cherry (Prunus padus) tree in flower, Priest Hill SWT Nature Reserve, Surrey, England, April.