Chris Gomersall / 2020VISION / Roosting flock of Red knot (Calidris canutus) long exposure, winter plumage, Snettisham RSPB reserve, Norfolk, England, UK, October
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Markus Varesvuo / Knot (Calidris canutus) preeing, Finland, August
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Markus Varesvuo / Knot (Calidris canutus) juvenile walking along shoreline, Finland, August
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Alan Williams / Knot (Calidris canutus) flock in flight over Dee Estuary with the North Wales coast in background. UK, December 2010.
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Alan Williams / Wader flocks mainly Knot (Calidris canutus) in flight over Liverpool Bay with frozen shore in foreground and the North Wales coast in background. UK, December 2010.
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Alan Williams / Knots (Calidris canutus) feeding on muddy shore at low tide. Liverpool Bay, UK, December.
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Alan Williams / Knot (Calidris canutus) in winter plumage on muddy shore. Liverpool Bay, UK, December.
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Alan Williams / Knot (Calidris canutus) flock in flight over Dee Estuary with the North Wales coast in background. UK, December 2010.
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Alan Williams / A group of Knot (Calidris canutus) feeding on shore at low tide. A wind farm is visible on the horizon. Liverpool Bay, UK, December.
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Alan Williams / Knot (Calidris canutus) flock in flight over frozen shore. Liverpool Bay, UK, December 2010.
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Alan Williams / Knot (Calidris canutus) roosting on shore in winter plumage. Liverpool Bay, UK, December.
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Alan Williams / Knots (Calidris canutus) feeding on muddy shore at low tide. A wind farm is visible on the horizon. Liverpool Bay, UK, December.
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Alan Williams / Knot (Calidris canutus) flock roosting on shore. Liverpool Bay, UK, December.
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Alan Williams / Knots (Calidris canutus) feeding on muddy shore at low tide. Liverpool Bay, UK, December.
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Alan Williams / Large flock of Knot (Calidris canutus) taking flight from shore. Liverpool Bay, UK, December.
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Barrie Britton / Mixed shorebirds feeding on the eggs of Atlantic horseshoe crabs (Limulus polyphemus). Includes Red knot (Calidris canutus rufa), Ruddy turnstone (Arenaria interpres), Dunlin (Calidris alpina) and Sem...
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Barrie Britton / Shorebirds feeding on the eggs of Atlantic Horseshoe Crabs (Limulus polyphemus). Includes Red knot (Calidris canutus rufa), Ruddy turnstone (Arenaria interpres), Dunlin (Calidris alpina) and Semipalma...
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Barrie Britton / Red Knot (Calidris canutus rufa) feeding on the backs of Atlantic Horseshoe Crabs (Limulus polyphemus). Red knots' spring migration coincides with the spawning of the crabs. Mispillion Harbour Reserve...
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Barrie Britton / Shorebirds including Red knot (Calidris canutus rufa) feeding among spawning Atlantic Horseshoe Crabs (Limulus polyphemus). Mispillion Harbour Reserve, Delaware Bay, USA. Picture taken during filming...
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David Tipling / Dense flock of Knot (Calidris canutus) at high tide roost. Snettisham RSPB Reserve, The Wash, Norfolk, UK, February
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Dave Bevan / Knot (Calidris canutus) walking on shingle, Norfolk, UK
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Alan Williams / Knot (Calidris canutus) in flight over water in winter plumage, Liverpool Bay, England, UK, March
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Alan Williams / Flock of Knot (Calidris canutus) in flight over water in winter plumage, Liverpool Bay, England, UK, March
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Gary K. Smith / Knot (Calidris canutus) in winter plumage, on shingle beach, Norfolk, England, February
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Ingo Arndt / Red Knot (Calidris canutus) flock during migration, Sylt Island, Germany
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Ingo Arndt / Red Knot (Calidris canutus) flock during migration, Sylt Island, Germany
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Ingo Arndt / Semipalmated Sandpiper (Calidris pusilla) and Red Knot (Calidris canutus) flock, Delaware Bay, Delaware
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Ingo Arndt / Semipalmated Sandpiper (Calidris pusilla) and Red Knot (Calidris canutus) flock, Delaware Bay, Delaware
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Ingo Arndt / Semipalmated Sandpiper (Calidris pusilla) and Red Knot (Calidris canutus) flock, Delaware Bay, Delaware
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Gerrit Vyn / Adult Red Knot (Calidris canutus) in breeding plumage near its nest. Seward Peninsula, Alaska, USA, June.
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Chris Gomersall / Flock of Red knot (Calidris canutus) in flight at high water on the Wash at sunset, Snettisham RSPB reserve Norfolk, March 2009
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Chris Gomersall / Red knot (Calidris canutus) on foreshore, Norfolk, England, October
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Tom Marshall / Red knot (Calidris canutus) in winter plumage feeding, Lake Ellesmere, Canterbury, New Zealand
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Laurie Campbell / Knot (Calidris canutus) feeding on tidal mudflat, Firth of Forth, Scotland, UK, March
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David Tipling / Large flock of Knot {Calidris canutus} arriving at high tide roost on island in gravel pit, Snettisham RSPB Reserve, Norfolk, UK, August 2006
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David Tipling / Large flock of Knot {Calidris canutus} at high tide roost, Snettisham RSPB Reserve, The Wash, Norfolk, UK, August
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David Tipling / Large flock of Knot {Calidris canutus} at high tide roost, Snettisham RSPB Reserve, The Wash, Norfolk, UK, August
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David Tipling / Large flock of Knot {Calidris canutus}, adults and juveniles, at high tide roost on island in gravel pit at Snettisham RSPB Reserve, Norfolk, UK, August
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Andy Rouse / Knot (Calidris canutus islandica) flock in winter roost, Lancashire, UK
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David Tipling / Large flock of Knot {Calidris canutus} swirling in flight over exposed mudflats of the Wash off Snettisham RSPB Reserve, Norfolk, UK, August
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David Tipling / Large flock of Knot {Calidris canutus} swirling in flight over exposed mudflats of the Wash off Snettisham RSPB Reserve, Norfolk, UK, August
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David Tipling / Large flock of Knot {Calidris canutus} swirling in flight over exposed mudflats of the Wash off Snettisham RSPB Reserve, Norfolk, UK, August
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Alan Williams / Knot (Calidris canutus) and Dunlin (Calidris alpina) massed flock landing at tide edge, winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) and Black tailed godwit (Limosa limosa) flock in flight over marshes, Dee Estuary, UK, November
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Alan Williams / Knot (Calidris canutus) and Dunlin (Calidris alpina) mixed wader flock in flight with turbines from wind farm in background, Liverpool Bay, UK, January
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Alan Williams / Mixed flock of waders, Dunlin (Calidris alpina) Knot (Calidris canutus) and Oystercatchers (Haematopus ostralegus) in flight over sea, Liverpool Bay, UK, September
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Wild Wonders of Europe / Novák / Dunlin (Calidris alpina) Knot (Calidris canutus) and Oystercatchers (Haematopus ostralegus) in flight, Grossmorsum, Sylt, Germany, April 2009
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Wild Wonders of Europe / Novák / Dunlin (Calidris alpina) Knot (Calidris canutus) and Oystercatchers (Haematopus ostralegus) landing in shallow water, Grossmorsum, Sylt, Germany, April 2009
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Wild Wonders of Europe / Novák / Dunlin (Calidris alpina) Knot (Calidris canutus) and Oystercatchers (Haematopus ostralegus) in shallow water and flying, Grossmorsum, Sylt, Germany, April 2009
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Alan Williams / Knot (Calidris canutus) feeding on muddy shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) running on mudflat at the edge of the ebbing tide in winter plumage, Liverpool Bay, UK, February
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Alan Williams / Knot (Calidris canutus) small flock in flight over shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) in winter plumage, Liverpool Bay, UK, January
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Alan Williams / Knot (Calidris canutus) on shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) flock in flight with wind turbines in the background, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) flock in flight at edge of receding tide with Oystercatchers in the foreground, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) walking on shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) roosting in tight packed flock on shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) flock in flight at sunset, Dee Estuary, Merseyside, UK, November
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Alan Williams / Knot (Calidris canutus) flock in flight in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) feeding on muddy shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) flock feeding on shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) roosting on shore in tight packed flock in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) with prey feeding in mud at edge of ebbing tide in winter plumage, Liverpool Bay, UK, February
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Alan Williams / Knot (Calidris canutus) flock feeding on muddy shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) walking on mudflat in winter plumage, Liverpool Bay, UK, February
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Alan Williams / Knot (Calidris canutus) flock roosting on shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) flock in flight, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) feeding on shore at edge of receeding tide in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) with prey feeding on sand and mud as tide ebbs in winter plumage, Liverpool Bay, UK, February
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Alan Williams / Knot (Calidris canutus) flock landing on shore at waters edge with wind turbines in background, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) on shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) in tight packed flock on shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) flock in flight at sunset, Dee Estuary, Merseyside, UK, November
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Alan Williams / Knot (Calidris canutus) flock landing to join other waders at the tideline in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) in tight packed flock on shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Flock of waders, mainly Knot (Calidris canutus) in flight with wind turbine in background, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) flock in flight over shore in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) roosting on shore in tight packed flock in winter plumage, Liverpool Bay, UK, November
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Alan Williams / Knot (Calidris canutus) running across windy sandflat in winter plumage, Liverpool Bay, UK, February
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Alan Williams / Knot (Calidris canutus) flock feeding on muddy shore, Liverpool Bay, UK, November
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Guy Edwardes / Flock of Knot (Calidris canuta) in flight, Ainsdale Sands, Formby, Merseyside, England
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Graham Eaton / Knot (Calidris canutus) walking through shallow water, Wirral, UK, November
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Graham Eaton / Knot (Calidris canutus) walking through shallow water, Wirral, UK, December
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Graham Eaton / Knot (Calidris canutus) walking through shallow water, Wirral, UK, December
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Graham Eaton / Knot (Calidris canutus) in shallow water, Wirral, UK, November
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Roger Powell / Flock of Red Knot {Calidris canutus} in breeding plumage flying over sea on spring migration, Varanger, Norway
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Roy Mangersnes / Knot (Calidris canutus) at sunrise in Orrevatnet Nature Reserve, a Ramsar site in Rogaland, Norway. August
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Roy Mangersnes / Knot (Calidris canutus) feeding at sunrise in Orrevatnet Nature Reserve, a Ramsar site in Rogaland, Norway. August
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Tom Vezo / Red Knot (Calidris canutus) flock flying, Rio Grande Valley, Texas
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Doug Wechsler / Red Knot {Calidris Canuta} walking on beach, Delaware Bay, New Jersey, USA
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Flip de Nooyer / Red Knot (Calidris canutus) and Eurasian Oystercatcher (Haematopus ostralegus) flocks resting on the shore, Europe
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Flip de Nooyer / Red Knot (Calidris canutus) flock flying over the sea, Europe
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Flip de Nooyer / Red Knot (Calidris canutus) flock resting on shore, Europe
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Tom Vezo / Red Knot (Calidris canutus), South Padre Island, Texas
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Tom Vezo / Red Knot (Calidris canutus) foraging in mudflats, South Padre Island, Texas
