LYNN M. STONE / Rooster / cockerel (Gallus gallus domesticus) perching on handle of antique wooden plow in corn field; Iowa, USA

LYNN M. STONE / Cochin rooster (Gallus gallus domesticus) on handle of antique wooden plow in corn field, Iowa, USA

Patricio Robles Gil / Native farmer using domestic animals to plow land for cultivation near Bangalore, Karnataka, India

Doug Allan / Snow plough positioning hut over ice hole for scuba diving, McMurdo Sound, Ross Sea, Antarctica.

Paul Harcourt Davies / Ploughshare orchid (Serapias vomeracea) flower close up, Mount Amiata, Tuscany, Italy. June.

Nigel Cattlin / Tractor and large reversible coulter plough ploughing old grassland for replanting, Berkshire, UK. November.

Paul Harcourt Davies / Serapicamptis - a natural hybrid (Serapicamptis tommasinii) between Long-lipped orchid (Serapias vomeracea) and Scented bug orchid (Anacamptis fragrans), Umbria, Italy. May.

Paul Harcourt Davies / Long-lipped orchid (Serapias vomeracea) with apochromic flowers lacking colour due to anthocyanins, Umbria, Italy. May.

Paul Harcourt Davies / Long-lipped orchid (Serapias vomeracea) in flower, Umbria, Italy. May.

Lorraine Bennery / Orchid (Serapias vomeracea) Aramon, Gard , France, May.

Paul Harcourt Davies / Ploughshare orchid (Serapias vomeracea) colourless morph with flowers lacking colour due to lack of anthocyanins. Umbria, Italy, May.

TJ Rich / Red kites (Milvus milvus) following the plough with Corvids (Corvus sp.) Pewsey Vale, Wiltshire, UK, May.