Heather Angel / Honey bee (Apis mellifera) forages on pollen in Apple (Malus domestica) flower, collecting pollen in pollen basket. In garden, Surrey, England, UK. May.

John Shaw / Hybrid Poplar tree plantation in autumn (Populs sp.). Boardman Tree Farm, near Irrigon, Oregon, USA. October.

John Waters / Walkers strolling along the bank between in flooded Aller Moor, with mistletoe laden apple tree, near Burrowbridge, Somerset Levels, Somerset, UK. January 2014

Daniel Heuclin / Aesculapian snake (Elaphe longissima) coiled in branch of apple tree, with fruit hanging below, Poitou France, Europe. Controlled conditions.

Gary K. Smith / Blue tit (Parus caeruleus) perching amongst crab apples, UK, November

Jason Smalley / Crab apple tree {Malus sylvestris} Silverdale, Lancashire, UK

Colin Varndell / Apple trees in blossom with Bluebells, UK

Nigel Cattlin / Apples (Malus domestica) with scab caused by Ascomycetes fungus (Venturia inaequalis). Berkshire, England, UK. September.

Nigel Cattlin / Apple (Malus domestica) buds swelling prior to leaves and flowers emerging in spring. Berkshire, England, UK. April.

Nigel Cattlin / Apple (Malus domestica) fruits infected with Brown rot (Monilinia spp.). Berkshire, England, UK. September.

Nigel Cattlin / Apple (Malus domestica) fruits with damage scars caused by European apple sawfly (Holocampa testudinea) feeding early in fruit development. Berkshire, England, UK. August.

Nigel Cattlin / Apple (Malus domestica) bud burst, flower buds opening surrounded by fresh green leaves. Berkshire, England, UK. April.

Nigel Cattlin / Apple (Malus domestica) flower buds and fresh green leaves following bud burst, Berkshire, England, UK. April.

Phil Savoie / Tawny mining (Andrena fulva) on apple tree blossom (Malus domestica), Monmouthshire, Wales, UK, April.

Phil Savoie / Mining bee (Andrena sp.) on Apple tree (Malus domestica) Ripon, Wisconsin, USA, May.

Phil Savoie / Ligated furrow bee (Halictus ligatus) on Apple blossom (Malus sp) Ripon, Wisconsin, USA, March.

Nigel Cattlin / Red spider mite (Panonychus ulmi) webbing on young Apple (Malus domestica) branch, damage to leaves.

Nigel Cattlin / Codling moth (Cydia pomonella) caterpillar exit hole on Apple (Malus domestica) fruit.

Nigel Cattlin / European red mite (Panonychus ulmi) eggs overwintering on Apple (Malus domestica) wood.

Nigel Cattlin / European red mite (Panonychus ulmi) eggs overwintering on Apple (Malus domestica) wood.

Nigel Cattlin / Vapourer (Orgyia antiqua) moth caterpillar on Apple (Malus domestica) leaf. England, UK.

Nigel Cattlin / Winter moth (Operophtera brumata) caterpillar and young damaged Apple (Malus domestica) leaf. Caterpillar a serious pest in apple orchards. England, UK.

Nigel Cattlin / Apple (Malus domestica) leaf bud with damage caused by developing Winter moth (Operophtera brumata) caterpillar. England, UK.

Nigel Cattlin / Vapourer moth (Orgyia antiqua) wingless female, a minor pest of Apple (Malus domestica). England, UK.

Nigel Cattlin / European red mite (Panonychus ulmi) eggs overwintering on Apple (Malus domestica) wood.

Nigel Cattlin / Apple (Malus domestica) tree leaves with interveinal chlorosis, symptom of iron deficiency.

Nigel Cattlin / Apple sucker (Cacopsylla mali) nymph, an orchard pest, on Apple (Malus domestica) leaf. Photomicrograph.

Nigel Cattlin / Apple sawfly (Hoplocampa testudinea) larva inside damaged Apple (Malus domestica) fruit, in cross section.

Nigel Cattlin / Apple (Malus domestica) branch with fruits and leaves. Leaves exhibiting interveinal chlorosis, symptom of iron deficiency.

Nigel Cattlin / Codling moth (Cydia pomonella) caterpillar exit hole on young Apple (Malus domestica) fruit.

Nigel Cattlin / Apple sucker (Cacopsylla mali) nymph, an orchard pest, on Apple (Malus domestica) leaf. Photomicrograph.

Ernie Janes / Magpie (Pica pica) perched in Apple tree (Malus sp) Titchwell, Norfolk, England, UK. May.

Ernie Janes / 'Lady Henniker' apple tree blossom (Malus domestica) Thornham Hall, Suffolk, England, UK.

Nick Upton / Male Blackbird (Turdus merula) feeding on Crab apple (Malus sylvestris), Wiltshire garden, UK, November.

Nick Upton / Grey squirrel (Sciurus carolinensis) eating Crab apple (Malus sylvestris) it has just picked, Wiltshire garden, UK, December.

Nick Upton / Grey squirrel (Sciurus carolinensis) reaching for Crab apple (Malus sylvestris) to eat, Wiltshire garden, UK, December.

Alan Williams / Mistletoe (Viscum album) growing on Apple tree (Malus domestica) in orchard Cheshire, England, UK, August.

Alan Williams / Apple (Malus domestica) blossom variety 'Arthur W. Barnes' in orchard, Cheshire, UK, May

Alan Williams / Apple (Malus domestica) blossom variety 'Egremont Russet' in orchard, Cheshire, UK, May

Alan Williams / Apple (Malus domestica) blossom variety 'Egremont Russet' in orchard, Cheshire, UK, May

Laurie Campbell / Crab apples (Malus sylvestris) growing in hedgerow, Berwickshire, Scotland, October.

Laurie Campbell / Crab Apples (Malus sylvestris) wide-angle view, Berwickshire, Scotland, October.

Ernie Janes / Cultivated tulips (Tulipa) with Apple blossom (Malus domestica) in background. April. England, UK.

Ernie Janes / Apple trees (Malus domestica) fan trained or espalier style along garden border. England, UK. May.

Gary K. Smith / Clutivated Apple tree blossom (Malus domestica 'Bramley's Seedling')

Gary K. Smith / Cultivated Crab apple tree (Malus-x-robusta 'Red-Sentinel') blossom

Phil Savoie / Blue tit (Cyanistes caeruleus) carrying insect prey to nest, Monmouthshire, Wales, UK. May.

Phil Savoie / Blue tit (Cyanistes caeruleus) carrying insect prey to nest, Monmouthshire, Wales, UK. May.

Phil Savoie / Blue tit (Cyanistes caeruleus) carrying insect prey to nest, Monmouthshire, Wales, UK. May.

Will Watson / Leominster Apple Fair in Leominster Priory with English apples varieties for sale, Herefordshire, England. 15th October 2016

Michael Hutchinson / Mistletoe (Viscum alba) stem growing from Apple tree bark (Malus sp) Herefordshire, UK, May

Michael Hutchinson / Mistletoe (Viscum alba) stem growing from Apple tree bark (Malus sp) Herefordshire, UK, May

Robin Chittenden / Brown hawker dragonfly (Aeshna grandis) on apple tree (Malus sp) Norfolk UK, July

Christophe Courteau / Organic Goldrush apple from France.

Christophe Courteau / Organic Goldrush apples from France.

Jean E. Roche / Apple (Malus pumila) blossom in organic orchard, Arles, Camargue, France, April.

Jean E. Roche / Apple (Malus pumila) blossom in organic orchard, Arles, Camargue, France, April.

Jean E. Roche / Siebold's crab apple (Malus sieboldii) blossom, outside Paris Natural History Museum, Paris, France, April 2015.

Nick Turner / Garden insect box positioned in an apple tree, Stroud, Gloucestershire, UK. May.

Nick Turner / Apple (Malus domestica) picking at Day's Cottage Heritage Orchard, Brookthorpe, Gloucestershire. Old orchards provide vital habitat for flora and fauna. September 2015.

Nick Turner / Apple (Malus domestica) picking at Day's Cottage Heritage Orchard, Brookthorpe, Gloucestershire. Old orchards provide vital habitat for flora and fauna. September 2015.

Nick Turner / Apple (Malus domestica) picking at Day's Cottage Heritage Orchard, Brookthorpe, Gloucestershire. Old orchards provide vital habitat for flora and fauna. September 2015.

Mike Read / Apple blossom (Malus domestica) in an allotment, Ringwood, Hampshire, UK April

Gary K. Smith / Bramley apples (Malus domestica) in wooden bucket, Norfolk, England UK. October

Gary K. Smith / Windfall Bramley apples (Malus domestica) in basket on lawn, Norfolk, England UK. October

Ernie Janes / Footpath sign against Apple blossom (Malus domestica) and field of Oilseed rape (Brassica napus) in flower, Norfolk, England, UK, March.

Jean E. Roche / Ripe Apples on tree, Camargue, France, September.

Jean E. Roche / Ripe 'Joya' apples on tree , Arles, Camargue, France, September.

Kim Taylor / Brown-lipped banded snail (Cepaea nemoralis) in apple tree. Surrey, England, April.

Kim Taylor / Brown-lipped banded snail (Cepaea nemoralis) in apple tree. Surrey, England, April.

John Waters / View from Burrow Hill near Langport, overlooking cider apple orchards for which the area is well known. Somerset Levels, UK, March 2014.

Chris Mattison / Roadside apple (Malus) tree, Lincolnshire, England, UK, October.

David Woodfall / Young boy looking at ripening apples (Malus domestica) planted in school garden to attract bees. Part of the Friends of the Earth national 'Bee Friendly' campaign,South Wales,UK, July 2014. MRDELETE

David Woodfall / Young girl looking at ripening apples (Malus domestica) planted in school garden to attract bees. Part of the Friends of the Earth national 'Bee Friendly' campaign,South Wales,UK, July 2014. MRDELETE

Phil Savoie / Hairy-footed flower bee (Anthophora plumipes) female feeding on apple blossom (Malus domestica). Monmouthshire, Wales, UK, April.

Phil Savoie / Hairy-footed flower bee (Anthophora plumipes) female feeding on apple blossom (Malus domestica). Monmouthshire, Wales, UK, April.

David Tipling / Blue Tit (Cyanistes caeruleus) in flowering apple tree, Norfolk, England, UK, May.

Jean E. Roche / Apple tree orchard with plastic bags to protect them from rodents. Arles, France, December.

John Cancalosi / Honeycrisp Apple, developed in Minnesota, 1961. Cross between 'Keepsake' and 'Unknown'.

Will Watson / Tractor on road with verge of flowering Cow Parsley (Anthriscus sylvestris) and flowering cider apple trees in background, Herefordshire, UK, June.

Will Watson / Car towing caravan down road with verge of flowering Cow Parsley (Anthriscus sylvestris) and flowering cider apple trees in background, Herefordshire, UK, June.

Will Watson / Flower-rich road verge with Cow Parsley (Anthriscus sylvestris) and flowering cider apple trees in background, Herefordshire, UK, June.

Philippe Clement / Apple tree (Malus domestica) blossom in orchard in spring, Hesbaye, Belgium. May 2013.

Philippe Clement / Apple tree (Malus domestica) blossom in orchard in spring, Hesbaye, Belgium. May.

Philippe Clement / Apple trees (Malus domestica) flowering in orchard in spring, Hesbaye, Belgium. May 2013.

Colin Varndell / Wild crab apple (Malus sylvestris) fruit. Dorset, UK October 2010

Loic Poidevin / Common Starlings (Sturnus vulgaris) feeding on windfall apples, West France, February

Loic Poidevin / Common Starling (Sturnus vulgaris) with windfall apples, West France, February

Ernie Janes / Greenfinch (Carduelis chloris) on a Apple blossom (Malus sp), UK , May

Ernie Janes / Great tit (Parus major) on Apple blossom (Malus sp) UK, March

David Woodfall / Crab Apple (Malus sylvestris) in flower on spring evening, Gilfach Nature Reserve, Radnorshire Wildlife Trust, Powys, Wales, UK May

David Woodfall / Crab Apple (Malus sylvestris) in flower in spring, Gilfach Nature Reserve, Radnorshire Wildlife Trust, Powys, Wales, UK

David Woodfall / Crab Apple tree (Malus sylvestris) in flower in meadow of upland Gilfach Nature Reserve, Radnorshire Wildlife Trust, Powys, Wales, UK, May

Paul Harris / 2020VISION / Volunteer picking Crab apples (Malus baccata) from tree, Old Sleningford Community Farm, North Yorkshire, England, UK, September 2011.

Alan Williams / Crab apple (Malus sylvestris) fruits on tree grown at roadside in Cheshire village, UK, October.

Alan Williams / Crab apple (Malus sylvestris) fruits on tree grown at roadside in Cheshire village, UK, October.