Nick Upton / White stork (Ciconia ciconia) with three chicks in nest at top of an Oak tree, gaping in hot sunshine with one exercising its wings, Knepp Estate, Sussex, UK, June.
Ross Hoddinott / Oak tree (Quercus robur) growing among bracken (Pteridium aquilinum), autumn colour, The New Forest, Hampshire, UK. November 2016
Solvin Zankl / Female Acorn weevil (Curculio glandium) boring into oak tree acorn to lay eggs, Lower Saxonian Elbe Valley Reserve, Germany, September.
Juergen Freund / Firefly (Lampyridae) trails on beach at night, Palm tree silhouetted against milky way. Oak Beach, Port Douglas, Far North Queensland, Australia. 2016.
Andres M. Dominguez / Cork trees (Quercus suber) stripped of bark, in forest. Los Alcornocales Natural Park, Cortes de la Frontera, southern Spain, November.
Andres M. Dominguez / Ferns on the forest floor with Cork trees (Quercus suber )stripped of bark in the background, Los Alcornocales Natural Park, southern Spain, November
Andres M. Dominguez / Holm oak (Quercus ilex) in the Sierra de Grazalema Natural Park, Benaocaz, southern Spain, November.
Marie Read / Blue jay (Cyanocitta cristata) holding an acorn in its bill whilst perched on tree stump, with autumn foliage, New York, USA, October.
Nick Upton / White stork (Ciconia ciconia) pair performing an up-down display with bill clattering on their nest in an Oak tree, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of White s...
Nick Upton / White stork (Ciconia ciconia) male landing with nest material and joining his mate on their nest in an Oak tree at sunset, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of...
SCOTLAND: The Big Picture / Stream in spate in native oak woodland in summer, Clonaig, Kintyre, Argyll, Scotland, UK, July 2015.
Nick Upton / Forest caterpillar hunter (Calosoma sycophanta) feeding on a Gypsy moth caterpillar (Lymantria dispar) it has killed in a Holm oak tree, Bacu Goloritze ravine, Baunei, Sardinia, Italy, May.
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 / 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) sitting on an old giant gnarled Oak tree. Highlands, Scotland, UK, January. Highly Commended in the Habitat Category of the British Wildlife Photography Awards (BWPA) C...
SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) descending trunk of Oak tree, Cairngorms National Park, Highlands, Scotland, UK, October 2015.
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
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 / Wood Warbler (Phylloscopus sibilatrix) singing from an oak tree, Atlantic Oakwoods of Sunart, Scotland, May.
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.
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