Mark Brownlow / Sperm whale {Physeter macrocephalus} diving, tail fluke, Kaikoura, South Island, New Zealand

Markus Varesvuo / White-backed woodpecker (Dendrocopos leucotos) male in tree, Kotka, Finland, January

Markus Varesvuo / White-backed woodpecker (Dendrocopos leucotos) male in tree, Kotka, Finland, January

Markus Varesvuo / Magpie (Pica pica) perched in tree 'doing the splits', Spain, December

Markus Varesvuo / Knot (Calidris canutus) flock on shoreline, Hanko, Finland, September

Markus Varesvuo / Fulmar (Fulmarus glacialis) flying over Icelandic ponies, Iceland, June

Markus Varesvuo / Black stork (Ciconia nigra) in flight, Tarifa, Spain, September

Markus Varesvuo / Black kite (Milvus migrans) flying near to wind turbine, Tarifa, Spain, September 2008

Markus Varesvuo / Black stork (Ciconia nigra) in flight, Tarifa, Spain, September

Markus Varesvuo / Black stork (Ciconia nigra) in flight, Tarifa, Spain, September

Markus Varesvuo / Black Stork (Ciconia nigra) in flight on migration, Tarifa, Spain, September

Markus Varesvuo / Black stork (Ciconia nigra) in flight, Tarifa, Spain, September, digitally enhanced