Phil Savoie / English oak tree (Quercus robur) in field of cultivated Maize (Zea mays) seedlings, Monmouthshire, Wales, UK, May.

Stephen Dalton / Barn Owl (Tyto alba) flying from nest in Oak tree, UK

Doug Wechsler / Dew-covered White oak leaf {Quercus alba} with dew, New Jersey, USA

Larry Michael / White oak with acorns {Quercus alba} Wisconsin, USA

Larry Michael / White oak trees {Quercus alba} WI, USA - Early autumn Sequence 4/5

Larry Michael / White oak trees {Quercus alba} WI, USA Summer. Sequence

Larry Michael / White oak tree {Quercus alba} in winter. Wisconsin, USA

Kevin J Keatley / Barn owl {Tyto alba} nest in 200 yr old oak tree {Quercus robur} Dartmoor, Devon, UK

Visuals Unlimited / White Oak (Quercus alba) tree silhouetted at twilight, Cades Cove, Great Smoky Mountains National Park, Tennessee, USA.

Visuals Unlimited / Cross-section of White Oak wood (Quercus alba) showing growth or annual rings and springwood and summerwood, LM.

Visuals Unlimited / White Oak tree (Quercus alba) acorns and leaves, North America.

Visuals Unlimited / White Oak tree (Quercus alba) fallen leaves with rain drops on the forest floor, North America.