Alan Williams / Domestic pigeons (Columba livia) flock in flight over houses, Cheshire, UK, June.

Jeff Wilson / Rear view of pilots and Trango towers in the Karakoram Mountains, Himalayas, Pakistan, from Pakistani military helicopter, for BBC series Planet Earth. April 2005

Jeff Wilson / Aerial view of glaciated valley of Concordia, Karakoram Mountains, Himalayas, Pakistan. From Pakistani military helicopter for BBC series Planet Earth April 2005

Jeff Wilson / Aerial view of K2 and glaciated valley of Concordia, Karakoram Mountains, Himalayas, Pakistan. From Pakistani military helicopter for BBC series Planet Earth April 2005

Jeff Wilson / Aerial view of K2 and glaciated valley, Concordia, Karakoram Mountains, Himalayas, Pakistan. From Pakistani military helicopter for BBC series Planet Earth 2005

Jeff Wilson / Aerial view of Broad Peak in the Concordia confluence, Karakoram Mountains, Himalayas, Pakistan. From Pakistani military helicopter for BBC series Planet Earth 2005

Robert Fulton / Aerial view of mountain range in Torres Del Paine NP, Chile, South America

Robert Fulton / Aerial view of snow capped mountains, Torres del Paine NP, Chile

Robert Fulton / Aerial view of glacier near Lago Argentino, Argentina

Robert Fulton / Aerial view of mountains near Salar de Uyuni, Bolivia

Dave Bevan / Common starling (Sternus vulgaris) singing, perched on a television aerial, Norfolk, England, UK, February.

Terry Whittaker / Red kite (Milvus milvus) in flight past TV aerial, attracted by leftover food from a roadside cafe, Chilterns, England, May.