Peter Cairns / 2020VISION / Flock of Knot (Calidris canuta) in flight. The Wash Estuary, Norfolk, October.

Andy Rouse / 2020VISION / Flock of Knot (Calidris canuta) taking flight. Snettisham, UK, January. Did you know? The red knot has one of the longest migrations in the world, with some travelling 9000 miles from the Arctic to th...

Andy Rouse / 2020VISION / Flock of Knot (Calidris canuta) over sea with wind turbine. Liverpool Bay, UK, December.

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Paul Hobson / Knot (Calidris canutus) flock roosting on beach. Norfolk, August.

Erlend Haarberg / Red Knots (Calidris canutus) on migration rest on coastal rocks as waves wash across the coastline. The Snfellsnes peninsula, Iceland, May. Wildlife Photographer of the Year competition 2011, runner-...

Orsolya Haarberg / Red Knots (Calidris canutus) during migration rest on coastal rocks as waves wash across the coastline. The Snæfellsnes peninsula, Iceland, May. Highly commended in the Birds category of the GDT 2011...

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight, long exposure, winter plumage, Snettisham RSPB reserve, Norfolk, England, UK, October. Did you know? The Wash Estuary in Norfolk is estimated to have a...

Chris Gomersall / 2020VISION / Roosting flock of Red knot (Calidris canutus) long exposure, winter plumage, Snettisham RSPB reserve, Norfolk, England, UK, October. 2020VISION Book Plate.

Chris Gomersall / 2020VISION / Roosting flock of Red knot (Calidris canutus) long exposure, winter plumage, Snettisham RSPB reserve, Norfolk, England, UK, October

Alan Williams / Black-tailed Godwits (Limosa limosa) and Knots (Calidris canutus) in flight in early morning light, Dee Estuary, Merseyside, England, UK, February

Wild Wonders of Europe / Novák / Flock of Dunlin (Calidris alpina) and Knot (Calidris canutus) taking off, Grossmorsum, Sylt, Germany, April 2009

Laurie Campbell / Flock of Knot {Calidris canutus} in flight over waves, North Northumberland, England, February

David Tipling / Mixed flock of Black-tailed Godwit {Limosa limosa} with Knot {Calidris canutus} and Redshank {Tringa totanus} at high tide roost, Snettisham RSPB Reserve, The Wash, Norfolk, UK, August

David Tipling / Mixed flock of Knot {Calidris canutus} and Oystercatcher {Haematopus ostralegus} at high tide roost, Snettisham RSPB Reserve, The Wash, Norfolk,UK, summer

David Tipling / Large flock of Knot {Calidris canutus} at high tide roost, Snettisham RSPB Reserve, The Wash, Norfolk, UK, August

Andy Rouse / Flock of Knot (Calidris canuta) in flight, UK

Andy Rouse / Knot (Calidris canutus islandica) in winter roost, Lancashire, UK

Andy Rouse / Knot (Calidris canuta) spiral during flight when being attacked by peregrine falcon, UK

Andy Rouse / Knot (Calidris canutus islandica) in water at winter roost site, Lancashire, UK

Graham Eaton / Knot (Calidris canutus) flock flying in front of East Hoyle Windfarm, Wirral, UK, November 2008

Andrew Parkinson / Knot {Calidris canutus} part of a large flock of approx 30,000 birds come in to land at dawn. Norfolk, UK

Chris Gomersall / Flock of knot (Calidris canutus) at high water roost. Snettisham RSPB reserve, Norfolk, England.

Chris Gomersall / Abstract flock of knot (Calidris canutus) in flight. Snettisham RSPB reserve, Norfolk, England.

Paul Hobson / Knot (Calidris canutus) foraging in shallow water in winter plumage, Yorkshire, UK February

Paul Hobson / Knot (Calidris canutus) foraging in shallow water in winter plumage, Yorkshire, UK February

Paul Hobson / Knot (Calidris canutus) foraging in shallow water in winter plumage, Yorkshire, UK February

Paul Hobson / Knot (Calidris canutus) foraging in shallow water in winter plumage, Yorkshire, UK February

Paul Hobson / Knot (Calidris canutus) foraging in shallow water in winter plumage, Yorkshire, UK February

Andrew Parkinson / Knot (Calidris canutus) adult in shallow water. Shetland Islands, Scotland, UK, September.

Andrew Parkinson / Knot (Calidris canutus) adult. Shetland Islands, UK, September.

Andrew Parkinson / Knot (Calidris canutus) adult on beach. Shetland Islands, Scotland, UK, September.

Andrew Parkinson / Knot (Calidris canutus) adult on beach. Shetland Islands, Scotland, UK.

Andrew Parkinson / Knot (Calidris canutus) adult on beach. Shetland Islands, Scotland, UK, September.

Andrew Parkinson / Knot (Calidris canutus) adult foraging on beach. Shetland Islands, Scotland, UK, September.

Andrew Parkinson / Knot (Calidris canutus) adult foraging on beach. Shetland Islands, Scotland, UK, September.

Andrew Parkinson / Knot (Calidris canutus) flock taking flight. Norfolk, UK, September.

Andrew Parkinson / Knot (Calidris canutus) large flock in flight before roosting. Norfolk, UK, September.

Orsolya Haarberg / Red knot (Calidris canutus) flock feeding on coastal rocks that are washed by waves with two eiders (Somateria mollissima) resting on rocks in the top-left-hand corner. Snaefellsnes peninsula, Iceland...

Andy Rouse / Knot (Calidris canuta) flock in flight on foreshore with wind turbines in distance, Liverpool Bay, UK December

Peter Cairns / 2020VISION / Large flock of Oystercatchers (Haematopus ostralegus) and Knot (Calidris canuta) taking flight. The Wash Estuary, Norfolk, England, UK, October. 2020VISION Book Plate.

Peter Cairns / 2020VISION / Large flock of Oystercatchers (Haematopus ostralegus) and Knot (Calidris canuta) taking flight. The Wash Estuary, Norfolk, October.

Peter Cairns / 2020VISION / Large flock of Oystercatchers (Haematopus ostralegus) and Knot (Calidris canuta) taking flight. The Wash Estuary, Norfolk, October.

Peter Cairns / 2020VISION / Large flock of Oystercatchers (Haematopus ostralegus) and Knot (Calidris canuta) taking flight. The Wash Estuary, Norfolk, October.

Peter Cairns / 2020VISION / Large flock of Oystercatchers (Haematopus ostralegus) and Knot (Calidris canuta) taking flight. The Wash Estuary, Norfolk, October.

Peter Cairns / 2020VISION / Flock of Oystercatchers (Haematopus ostralegus) and Knot (Calidris canuta) in flight and on tidal shallows. The Wash Estuary, Norfolk, September.

Andy Rouse / 2020VISION / Knot (Calidris canuta) and Oystercatchers (Haematopus ostralegus) roosting and foraging on tidal flats. Liverpool Bay, UK, December.

Andy Rouse / 2020VISION / Knot (Calidris canuta) and other waders foraging on tidal flats with wind farm on horizon. Liverpool Bay, UK, December.

Terry Whittaker / 2020VISION / Flock of Knot (Calidris canutus) in flight over mudflats, Leigh-on-Sea, Essex, England, UK, December.

Terry Whittaker / 2020VISION / Knot (Calidris canutus), Dunlin (Calidris alpina) and Grey plover (Pluvialis squatarola) resting on shoreline in snow, South Swale, Kent, England, UK, February.

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary at sunset, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary at sunset, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary at sunset, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) in flight at high water on the Wash estuary, with bird hide in the background, Snettisham RSPB reserve, Norfolk, England,...

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) in flight at high water on the Wash estuary, with bird hide in the background, Snettisham RSPB reserve, Norfolk, England,...

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

Chris Gomersall / 2020VISION / Flock of Red knot (Calidris canutus) in flight at high water on the Wash estuary, Snettisham RSPB reserve, Norfolk, England, UK, March

David Tipling / 2020VISION / Knot Calidris canuta flock arriving at high tide roost on the Wash at Snettisham RSPB Reserve Norfolk winter

Brent Stephenson / Red knot (Calidris canutus) moulting out of breeding plumage, feeding on mudflats, Manawatu Estuary, Manawatu, New Zealand, September.

Alan Williams / Black-headed gull (Chroicocephalus ridibundus) walking through flock of Knots (Calidris canutus) roosting on shore in early morning, Liverpool Bay, UK, December.

Alan Williams / Knot (Calidris canutus) large flock walking on shore before rising tide, Liverpool Bay, UK, December.

Erlend Haarberg / Red knot (Calidris canutus) flock feeding on coastal rocks with wind blowing waves, Snaefellsnes Peninsula, Iceland, May 2010

Martin Willis / Great Knot (Calidris tenuirostris) dense flock flying, Ross River, Townsville, Queensland, Australia

Billy Black / Father teaching his son how to tie a knot aboard a Hunter 49 yacht off St. Augustine, Florida, USA. Model and Property released, 2006.

Billy Black / Father teaching his son how to tie a knot aboard a Hunter 49 yacht off St. Augustine, Florida, USA. Model and Property released, 2006.

Onne van der Wal / Knot against the side of a colourful boat in the Grenadines, Caribbean. February 2010.

Paul Hobson / Knot (Calidris canutus) flock roosting on beach before wind farm. Norfolk, UK, August.

Paul Hobson / Knot (Calidris canutus) flock in flight. Norfolk, UK, September.

Paul Hobson / Knot (Calidris canutus) flock roosting on beach. Norfolk, August.

Chris Gomersall / 2020VISION / Large flock of Knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) flying in a dense cloud whilst gathering on the foreshore at Snettisham RSPB reserve at high water, The Wash, Norfolk, E...

Chris Gomersall / 2020VISION / Large flock of Knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) flying in a dense cloud whilst gathering on the foreshore at Snettisham RSPB reserve at high water, The Wash, Norfolk, E...

Chris Gomersall / 2020VISION / Large flock of Knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) flying in a dense cloud whilst gathering on the foreshore at Snettisham RSPB reserve at high water, The Wash, Norfolk, E...

Chris Gomersall / 2020VISION / Large flock of Knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) gathering to roost on the foreshore at Snettisham RSPB reserve at high water, The Wash, Norfolk, England, UK, January

Chris Gomersall / 2020VISION / Large mixed flock of waders and wildfowl, including Knot (Calidris canutus), Bar-tailed godwit (Limosa lapponica), Common redshank (Tringa totanus), Dunlin (Calidris alpina), Oystercatcher (Haematopus...

Chris Gomersall / 2020VISION / Large mixed flock of waders and wildfowl, including Knot (Calidris canutus), Bar-tailed godwit (Limosa lapponica), Common redshank (Tringa totanus), Dunlin (Calidris alpina), Oystercatcher (Haematopus...

Chris Gomersall / 2020VISION / Large mixed flock of waders and wildfowl, including Knot (Calidris canutus), Bar-tailed godwit (Limosa lapponica), Common redshank (Tringa totanus), Dunlin (Calidris alpina), Oystercatcher (Haematopus...

Chris Gomersall / 2020VISION / Large mixed flock of waders and wildfowl, including Knot (Calidris canutus), Bar-tailed godwit (Limosa lapponica), Common redshank (Tringa totanus), Dunlin (Calidris alpina), Oystercatcher (Haematopus...

Chris Gomersall / 2020VISION / Large flock of Knot (Calidris canutus) and Bar-tailed godwit (Limosa lapponica) flying in a dense cloud whilst gathering on the foreshore at Snettisham RSPB reserve at high water, The Wash, Norfolk, E...

Chris Gomersall / 2020VISION / Knot (Calidris canutus) in winter plumage, on shore, Norfolk, England, UK, November

Chris Gomersall / 2020VISION / Knot (Calidris canutus) in winter plumage, on shore, Norfolk, England, UK, November

Jonathan Harrod / California Quail (Callipepla californica) male, Christchurch, New Zealand

Brent Stephenson / Adult Red Knot (Calidris canutus) moulting out of breeding plumage, feeding on mudflats. Manawatu Estuary, Manawatu, New Zealand, September.

Brent Stephenson / Adult Red Knot (Calidris canutus) moulting out of breeding plumage, feeding on mudflats. Manawatu Estuary, Manawatu, New Zealand, September.

Brent Stephenson / Adult Red Knot (Calidris canutus) moulting out of breeding plumage feeding with a non-breeding plumaged Curlew Sandpiper (Calidris ferruginea) on mudflats. Manawatu Estuary, Manawatu, New Zealand, Sep...

Colin Varndell / Caterpillar larva of Knot grass moth (Acronicta rumicis) Dorset, UK, September

Colin Varndell / Caterpillar larva of Knot grass moth (Acronicta rumicis) Dorset, UK, September

Robert Thompson / Knot grass moth (Acronicta rumicis) resting on bark, camouflaged, County Fermanagh, Northern Ireland, UK, June

Andrew Parkinson / Little egret (Egretta garzetta) comes in to land and startles group of roosting Knot (Calidris canutus), The Wash, Norfolk, UK, September.