Dave Bevan / Slow motion clip of two pairs of Jackdaws (Corvus monedula) squabbling over nest site, Worcestershire, England, UK, May.
Bernard Castelein / Oak (Quercus robur) in Heather (Calluna vulgaris) at sunrise, Klein Schietveld, Brasschaat, Belgium
Theo Bosboom / Autumn foliage including Beech and Oak leaves and Rowan berries floating in the current of a mountain stream, La Hoegne, Ardennes, Belgium.
Theo Bosboom / Autumn leaves from Beech trees, Oak trees and Birch trees floating under water in the current of a mountain stream, La Hoegne, Ardennes, Belgium.
Theo Bosboom / Autumn leaves from Beech, Oak and Birch trees floating on water, taken from underwater, Ardennes, La Hoegne, Belgium.
Theo Bosboom / Oak and Beech tree leaves in autumn colours floating on water of mountain stream, La Hoegne / High Fenn, Ardennes, Belgium
Ross Hoddinott / Ancient oak tree (Quercus robur), Marsland Mouth, Devon Wildlife Trust, Devon, UK. April 2017.
SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) descending trunk of Oak tree, Cairngorms National Park, Highlands, Scotland, UK, October 2015.
SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) nibbling on oak buds, Cairngorms National Park, Highlands, Scotland, UK, January.
Andres M. Dominguez / Portuguese oak tree (Quercus faginea) covered in moss, Los Alcornocales Natural Park, southern Spain, November.
Andres M. Dominguez / Holm oak tree (Quercus ilex) in snowfall, Sierra de Grazalema Natural Park, southern Spain, January.
Solvin Zankl / Great capricorn beetle (Cerambyx cerdo) on Oak tree (Quercus sp) Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, July.
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 / Gall wasp (Cynips quercusfolii) emerging from the oak gall. Germany, October.
Solvin Zankl / English oak tree (Quercus robur) silhouetted against orange sky with star trails, Nauroth, Germany, October.
Solvin Zankl / Springtail (Dicyrtomina ornata) on oak tree leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.
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 / Stag beetle (Lucanus cervus) silhouetted against oak tree leaf. Elbe, Germany, June.
Solvin Zankl / Stag beetle (Lucanus cervus) male on oak tree. Elbe, Germany, June.
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.
Kirkendall-Spring / Oak trees (Quercus) in the fog, Figueroa Mountain, Los Padres National Forest, California, USA.
Matthew Maran / Oak tree (Quercus robur) in snow, Hampstead Heath, London, UK, January 2013.
Ben Hall / Stunted oak woodland covered in moss, Wistman's Wood, Devon, UK. August. Highly Commended in the Wild Woods category of the British Wildlife Photography Awards (BWPA) competition 2013.
Jouan Rius / Black oak (Quercus velutina) in autumn, in Yosemite valley, Yosemite National Park, California, USA, December 2012.
Juan Carlos Munoz / Iberian black pig in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico
Juan Carlos Munoz / Iberian black pig foraging in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico
Theo Bosboom / Oak tree (Quercus sp) with snow in autumn, Rozendaalse Bos, near Arnhem, the Netherlands, November
Niall Benvie,Niall Benvie / Oak Eggar Moth (Lasiocampa quercus) against white background. France, July.
Sven Zacek,Sven Zacek / Famous Puhajarve war oak (Quercus) seen through dense fog. Southern Estonia, April 2011.
David Woodfall / Sessile oak (Quercus petraea) tree with sunlight behind, ancient semi natural woodland in Gilfach Nature Reserve, Radnorshire Wildlife Trust, Powys, Wales, UK May
Matthew Maran / Base of large Oak tree in Richmond Park, London, UK March 2012
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...
Fergus Gill / 2020VISION / Mixed woodland of ash alder, oak beech in autumn colours. Kinnoull Hill Woodland Park, Perthshire, Scotland, Novermber 2011.
Fergus Gill / 2020VISION / Wood Warbler (Phylloscopus sibilatrix) singing from an oak tree, Atlantic Oakwoods of Sunart, Scotland, May.
Andy Rouse / 2020VISION / Wood warbler (Phylloscopus sibilatrix) in flight in sesile oak forest, Wales, UK, May. 2020VISION Book Plate. Did you know? A group of warblers is known as a bouquet.
Rolf Nussbaumer / Northern raccoon (Procyon lotor) young at night climbing live Oak tree (Quercus virginiana) Dinero, Lake Corpus Christi, South Texas, USA.
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.
Mark Hamblin / 2020VISION / Robin (Erithacus rubecula) adult perched in winter with feather fluffed up, Scotland, UK, December
Mark Hamblin / 2020VISION / Coal tit (Periparus ater) adult perched in winter, Scotland, UK, December. Did you know? Coal tits keep in contact with their flock when searching for food, with constant 'dee' or 'seesee' calls.
Alex Hyde / Purple emperor butterfly (Apatura iris) male on English Oak (Quercus robur) leaf basking with wings open, UK, Captive.
Terry Whittaker / 2020VISION / Stag beetle (Lucanus cervus) two males displaying aggressive behaviour on oak tree branch at woodland edge, Suffolk, UK, Controlled conditions, July
Fabrice Cahez / Oak (Quercus sp) forest at dawn, Vosges, France, January
Nick Upton / Great capricorn / Great oak longhorn beetle (Cerambyx cerdo), one of the largest beetles in Europe, on tree trunk, Lesbos (Lesvos), Greece, June.
Pascal Tordeux / Oak (Quercus) covered with frost. Picardy, France.
Peter Cairns / 2020VISION / Oak woodland in spring with moss covered glacial rocks, Sunart Oakwoods, Ardnamurchan, Highland, Scotland, UK, May