Andrew Parkinson / 2020VISION / Marsh harrier (Circus aeruginosus) adult female preparing to land in reedbeds, backlit, Norfolk, UK, April

Andrew Parkinson / Puffin (Fratercula arctica) in flight, preparing to land on cliff top, with beak full of Sand eels (Ammodytes tobianus) Shetland Islands, Scotland, UK, July (non-ex)

Paul Hobson / Nuthatch (Sitta europaea) in flight, and preparing to land, South Yorkshire, England, UK. March.

Gerrit Vyn / Adult male Long-tailed Duck (Clangula hyemalis) in winter plumage preparing to land. Three females are following. Ocean County, New Jersey, USA, January.

David Pattyn / Common Crane (Grus grus) three flying and preparing to land, Mecklenburg-Vorpommern, Germany, October

Charlie Summers / Snow Goose (Chen caerulescens) in flight, preparing to land. Bosque del Apache, New Mexico, December.

Andrew Parkinson / 2020VISION / Marsh harrier (Circus aeruginosus) adult preparing to land at nest site in reedbeds, Norfolk, UK, June

Mike Potts / Trumpeter swan (Cygnus buccinator) in flight over Marsh Lake, preparing to land for resting and feeding during the long flight north to the breeding grounds in Alaska, Marsh Lake, Yukon, Canada, April

Mike Potts / Flock of Trumpeter swans (Cygnus buccinator) in flight over Marsh Lake, preparing to land for resting and feeding during their long flight north to the breeding grounds in Alaska, Marsh Lake, Yukon, C...

Bryan and Cherry Alexander / Air Greenland Dash-7 plane preparing to land at Qaanaaq. Northwest Greenland, September 2008.

Kevin Schafer / Grey-headed albatross (Thalassarche chrysostoma) in flight, preparing to land, South Georgia Island, Vulnerable species, December

Andrew Parkinson / Puffins (Fratercula arctica) in flight, preparing to land on cliff top, Shetland Islands, Scotland, UK, July (non-ex)

Andrew Parkinson / Puffin (Fratercula arctica) in flight, preparing to land on cliff top, Shetland Islands, Scotland, UK, July (non-ex)

Andrew Parkinson / Puffin (Fratercula arctica) in flight, preparing to land on cliff top, Shetland Islands, Scotland, UK, July (non-ex)

Bryan and Cherry Alexander / MI-2 helicopter preparing to land on rear deck of Russian Icebreaker "Kapitan Dranitsyn". Franz Josef Land, Russia, 2004.

John Waters / Rook (Corvus frugilegus) in flight, preparing to land on wall, Chew Valley, Somerset, England, UK, April.

John Waters / Rook (Corvus frugilegus) in flight, preparing to land on wall, Chew Valley, Somerset, England, UK, April.

Paul Hobson / Nuthatch (Sitta europaea) in flight, and preparing to land, South Yorkshire, England, UK. March.

Charlie Summers / Tree Swallow (Tachycineta bicolor) in flight, preparing to land at Western Bluebird nest box, Colorado, USA, North America

Andrew Parkinson / Canada goose (Branta canadensis) preparing to land on a frozen lake at dawn, Nottinghamshire, UK

Juergen Freund / Fisherman preparing his fishing gear and boat to go night fishing with his son, Camarines Sur, Luzon, Philippines 2008.

Philippe Clement / White stork {Ciconia ciconia} against blue sky, preparing to land, Spain

Philippe Clement / White stork {Ciconia ciconia} against blue sky, preparing to land, Spain