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...

Kirkendall-Spring / Oak trees (Quercus) in the fog, Figueroa Mountain, Los Padres National Forest, California, USA.

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,...

Oriol Alamany / Cork Oak (Quercus suber) amid blooming Spanish Lavender (Lavanda stoechas) and White Asphodel (Asphodelus albus) in sierra de las Corchuelas, Monfrague National Park, Caceres, Extremadura, Spain, Apri...

Jose B. Ruiz / Silhouette of White stork {Ciconia ciconia} on nest in Holm Oak Tree {Quercus ilex} at sunrise, Spain.

Jack Dykinga / Details of wood grain structure of Arizona white oaks (Quercus arizonica). Stress from lack of water and pest infection can cause elaborate swirls and intricate patterns. Conelo Hills, near Sonoita Co...

Jack Dykinga / Details of wood grain structure of Arizona white oaks (Quercus arizonica) Stress from lack of water and pest infection can cause elaborate swirls and intricate patterns. Dragoon Mountains, Coronado Na...

Colin Varndell / Cut out of Pedunculate oak (Quercus robur) leaf. September.

Nick Upton / White stork (Ciconia ciconia) pair standing on their nest in an Oak tree, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of White storks nesting in the UK for several hundre...

Nick Upton / White stork (Ciconia ciconia) male landing with nest material at nest in Oak tree, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of White storks nesting in the UK for sever...

Nick Upton / White stork (Ciconia ciconia) male landing with nest material as his mate bill clatters on their nest in an Oak tree, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of White...

Nick Upton / White stork (Ciconia ciconia) male landing with nest material and joining his mate on their nest in an Oak tree, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of White stor...

Nick Upton / White stork (Ciconia ciconia) pair arranging nest material on their nest in an Oak tree, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of White storks nesting in the UK for...

Ernie Janes / Oak (Quercus robur) acorns and leaves, silhouetted on white background.

Phil Savoie / Black and white image of English oak tree (Quercus robur) with long exposure of wind blown clouds, Monmouthshire, Wales, UK, September 2017.

Doug Wechsler / Plant bug (Hyaliodes harti) on white oak, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June.

Paul Harcourt Davies / Oak twig with a variety of lichen species, Podere Montecucco, Orvieto, Umbria, Italy. December. Focus stacked image.

Doug Wechsler / Poison ivy vine (Toxicodendron radicans) climbing up White oak tree (Quercus) Fort Washington State Park, Pennsylvania, USA October

Doug Wechsler / Acrobat ant (Crematogaster sp) tending aphids on white oak (Quercus sp) Washington State Park, Pennsylvania, USA September

Doug Wechsler / Acrobat ant (Crematogaster sp) tending aphids on white oak (Quercus sp) Washington State Park, Pennsylvania, USA September

Doug Wechsler / Bald-faced hornet (Dolichovespula maculata) worker feeding at alcohol flux - fermented sap- on white oak trunk (Quercus) Fort Washington State Park, Pennsylvania, USA

Doug Wechsler / Bald-faced hornet (Dolichovespula maculata) worker feeding at alcohol flux - fermented sap- on white oak trunk (Quercus) Fort Washington State Park, Pennsylvania, USA

Doug Wechsler / Bald-faced hornet (Dolichovespula maculata) worker feeding at alcohol flux - fermented sap- on white oak trunk (Quercus) Fort Washington State Park, Pennsylvania, USA

Doug Wechsler / Ferruginous carpenter ant (Camponotus chromaiodes) worker feeding at alcohol flux - fermented sap - on white oak (Quercus sp) trunk, Fort Washington State Park, Pennsylvania, USA August

Doug Wechsler / Ferruginous carpenter ant (Camponotus chromaiodes) worker feeding at alcohol flux - fermented sap of white oak tree (Quercus sp) - Fort Washington State Park, Pennsylvania, USA August

Doug Wechsler / Eastern grey squirrel (Sciurus carolinensis) on White oak (Quercus sp) eating fermented sap (alcohol flux), Fort Washington State Park, Pennsylvania, USA July

Doug Wechsler / Eastern grey squirrel (Sciurus carolinensis) on White oak (Quercus sp) eating fermented sap (alcohol flux), Fort Washington State Park, Pennsylvania, USA July

Doug Wechsler / Eastern grey squirrel (Sciurus carolinensis) on White oak (Quercus sp) eating fermented sap (alcohol flux), Fort Washington State Park, Pennsylvania, USA July

Robert Thompson / Southern white admiral (Limenitis reducta) North of Lorgues, Provence, southern France, May.

SCOTLAND: The Big Picture / White-lipped snail (Cepaea hortensis) on oak branch within oak woodland, Scotland, UK, May.

Chris Mattison / Knopper Oak gall remains, caused by the wasp (Andricus quercuscalicis) Forest of Dean, Gloucestershire, UK May

MYN / Marc Pihet / Common cockchafer (Melolontha melolontha) on oak leaves, Maine-et-Loire, France, April, meetyourneighbours.net project

MYN / Marc Pihet / Common cockchafer (Melolontha melolontha) on oak leaves, Maine-et-Loire, France, April, meetyourneighbours.net project

MYN / Marc Pihet / Common cockchafer (Melolontha melolontha) on oak leaves, Maine-et-Loire, France, April, meetyourneighbours.net project

Matthew Maran / English oak tree (Quercus robur) trunk in winter, Hampstead Heath, London, February.

Matthew Maran / Lapsed field boundary. Beech Tree (Fagus sylvatica) and English oak tree (Quercus robur), Hampstead Heath, England, UK. February.

Mike Read / Pedunculate oak (Quercus robur) individual leaf on lightbox Ringwood Hampshire UK October

Mike Read / Pedunculate oak (Quercus robur) individual leaf on lightbox Ringwood Hampshire UK October

Mike Read / Turkey oak (Quercus cerris) individual leaf on lightbox Ringwood Hampshire UK October

Solvin Zankl / Acorn weevil (Curculio glandium) taking off from Oak tree (Quercus) leaf, Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, June.

Niall Benvie / Sessile oak (Quercus petraea) tree silhouetted against white sky, Mull, Scotland, UK, January. (This image may be licensed either as rights managed or royalty free.)

MYN / Niall Benvie / Pedunculate oak (Quercus robur) autumn leaf in the field studio, Angus, Scotland, UK. November

MYN / Niall Benvie / Pedunculate oak (Quercus robur) autumn leaf in the field studio, Angus, Scotland, UK. November

MYN / Niall Benvie / Pedunculate oak (Quercus robur) autumn leaf in the field studio, Angus, Scotland, UK. November

MYN / Niall Benvie / Pedunculate oak (Quercus robur) autumn leaf in the field studio, Angus, Scotland, UK. November (This image may be licensed either as rights managed or royalty free.)

MYN / Niall Benvie / Pedunculate oak (Quercus robur) autumn leaf in the field studio, Angus, Scotland, UK. November

MYN / Niall Benvie / Pedunculate oak (Quercus robur) autumn leaf in the field studio, Angus, Scotland, UK. November