Bernard Castelein / Oak (Quercus robur) in Heather (Calluna vulgaris) at sunrise, Klein Schietveld, Brasschaat, Belgium

Ross Hoddinott / Ancient oak tree (Quercus robur), Marsland Mouth, Devon Wildlife Trust, Devon, UK. April 2017.

Solvin Zankl / English oak tree (Quercus robur) in moonlight, Nauroth, Germany, February.

Niall Benvie / The Birnam Oak, an ancient English oak tree (Quercus robur) nearly 1000 years old, Perthshire, Scotland, UK, July.

Solvin Zankl / English oak tree (Quercus robur) silhouetted against orange sky with star trails, Nauroth, Germany, October.

Solvin Zankl / 'Femeiche' the Court Tree at night, an ancient English oak (Quercus robur) used in the Middle ages as Vehmic or secret court in which serious criminals were judged and executed. Erle, Germany, Octobe...

Solvin Zankl / The Scarce Merveille du Jour (Moma alpium) caterpillar with urticating hairs on English oak tree (Quercus robur) leaf, Stettin Lagoon, Bay of Szczecin, Germany, August.

Matthew Maran / Oak tree (Quercus robur) in snow, Hampstead Heath, London, UK, January 2013.

Sandra Bartocha / English oaks (Quercus robur) trees with snow on trunks, Gespensterwald / Ghost wood, Nienhagen, Germany, January

Guy Edwardes / 2020VISION / View over New Forest heathland with Oak (Quercus robur) tree. Fritham Cross, New Forest National Park, Hampshire, England, UK, August. Did you know? The New Forest has the most extensive area of heath...

Colin Varndell / English oak tree (Quercus robur) fallen acorns and leaves on a bed of moss, Oxfordshire, UK October.

Ross Hoddinott / 2020VISION / Close up of acorns and autumnal foliage ofEnglish oak (Quercus robur), Arne RSPB reserve, Dorset, England, UK, September. Did you know? Acorns are not produced until the tree is at least 40 years old.

Alex Hyde / Purple emperor butterfly (Apatura iris) male on English Oak (Quercus robur) leaf basking with wings open, UK, Captive.

Ross Hoddinott / 2020VISION / English oak tree {Quercus robur} acorn sprouting a fresh shoot, Beacon Hill Country Park, The National Forest, Leicestershire, UK, November. Did you know? In Norse legend the Oak tree was sacred to T...

Ross Hoddinott / 2020VISION / English oak tree {Quercus robur} acorn and fallen leaves in autumn, Beacon Hill Country Park, The National Forest, Leicestershire, UK, November

Ross Hoddinott / 2020VISION / New planting of young sapling English Oak tree (Quercus robur) in protective plastic ‘collar’, Feanedock Wood, The National Forest, Derbyshire, UK, November 2010.

Ross Hoddinott / 2020VISION / English oak {Quercus robur} leaf in autumn, Donisthorpe, The National Forest, Leicestershire, UK. November. Did you know? There are more than 600 species of oak around the world.

Mark Taylor / English Oak (Quercus robur) standing solitary in a field. Surrey, UK, October. Year sequence, 3 of 4 (autumn).

Mark Taylor / English Oak (Quercus robur) standing solitary in a field. Surrey, UK, November. Year sequence, 1 of 4 (winter).

Ernie Janes / Seedling English oak tree (Quercus robur) in the rain, UK

Adam Burton / Ancient Oak tree (Quercus robur) growing in Savernake Forest in springtime, Marlborough, Wiltshire, England. May 2009

Mike Read / Eurasian treecreeper (Certhia familiaris) on Ivy (Hedera helix) growing on English / Pendunculate oak (Quercus robur) tree, Hampshire, England, March

Wild Wonders of Europe / della Ferrera / Juvenile White tailed eagle (Haliaeetus albicilla) in an Slovenian / Common oak (Quercus robur) forest, Lonjsko Polje Nature Park, Ramsar Site, Sisack-Moslavina county, Slavonia region, Posavina area,...

Wild Wonders of Europe / della Ferrera / Slavonian / Common oak (Quercus robur) and Ash (Fraxinus sp) forest, near Mužilovcica village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Wild Wonders of Europe / della Ferrera / Pedunculate oak (Quercus robur) covered in thick stems of Common ivy (Hedera helix) Hutovo Blato Nature Park, Bosnia and Herzegovina, May 2009

Wild Wonders of Europe / Möllers / European oak (Quercus robur) trees, Klampenborg Dyrehaven, Denmark, October 2008

Wild Wonders of Europe / Möllers / European oak (Quercus robur) with rays of sunlight, Klampenborg Dyrehaven, Denmark, September 2008

Wild Wonders of Europe / Unterthiner / Close up of bark of Oak (Quercus robur) tree trunk, Bialowieza NP, Poland, February 2009 Wild Wonders kids book.

Niall Benvie / English / Pedunculate oak (Quercus robur) leaves encased in ice (studio) Inversnaid, Stirlingshire, Scotland, October

Kim Taylor / Pedunculate / English oak {Quercus robur} acorns, Surrey, England.

WILLIAM OSBORN / English oak tree in summer {Quercus robur} Wilts, UK Seasons sequence 2/4

WILLIAM OSBORN / English oak tree in spring {Quercus robur}, UK. Seasons sequence 1/4

Chris O'Reilly / Oak tree (Quercus robur) in field, Derbyshire, UK. sequence, March

Chris O'Reilly / Oak tree in field (Quercus robur) Derbyshire, UK. Sequence, May

Chris O'Reilly / English oak tree (Quercus robur) in field (January) Derbyshire, UK. Seasons sequence, winter

Chris O'Reilly / Oak tree {Quercus robur} Nottinghamshire, UK, October, sequence 3/4

Chris O'Reilly / Oak tree {Quercus robur} Nottinghamshire, UK, December, sequence 4/4

Neil Lucas / Wistmans Wood, Devon, UK - ancient oak woodland (Quercus robur, Quercus petraea and hybrids)

Phil Savoie / Milky Way over an English oak tree (Quercus robur), at night, Brecon Beacons National Park International Dark Sky Preserve, Wales UK, December

Adrian Davies / Oak Processionary Moth (Thaumetopoea processionea) nest of larvae on bark of Oak tree (Quercus robur) Surrey, UK, July

Bernard Castelein / Scot's pine (Pinus sylvestris) and Common oak (Quercus robur) trees in early morning mist. Klein Schietveld, Brasschaat, Belgium. July 2019.

Bernard Castelein / Sun rays filter through row of Oak (Quercus robur) trees. Peerdsbos, Brasschaat, Belgium. November.

Nigel Cattlin / Giant polypore (Meripilus giganteus) at base of diseased Pedunculate oak (Quercus robur) tree. Berkshire, England, UK. August.

Bernard Castelein / Oak leaves (Quercus robur), Peerdsbos, Brasschaat, Belgium. December

Mike Read / Fallow deer (Dama dama) calling to attract does rut. At rutting stand, Brinken Wood, New Forest National Park, Hampshire, England, UK. October.

Phil Savoie / Milky Way in night sky with silhouette of tree, Brecon Beacons National Park,an International Dark Sky Preserve, Wales, UK. December 2016.

Phil Savoie / English oak tree (Quercus robur) silhouetted in fog, Monmouthshire, Wales, UK. March.

David Woodfall / 'Stag Headed' English oak (Quercus robur) important habitat provided by dead wood for wildlife.Knepp Rewilding Estate, Sussex, England, UK, June.