Red knots on Sunset Beach during golden sunrise, North Carolina, United States of America, North America

Huge flock of knot (Calidris canutus) in flight, Snettisham RSPB reserve, Norfolk, England, United Kingdom, Europe

Knot (Calidris canutus) flock, in flight, at sunset in March, Isle of Sheppey, Kent, England, United Kingdom, Europe

Red Knot, (Calidris canutus) flocking on salt marsh on morecambe Bay, Cumbria, UK, a high tide.

Knot (Calidris canutus) . Soroby, Argyll,, Scotland, UK

Knot (Calidris canutus) walking in shallow water while looking for food in a small beach stream. Soroby. Argyll, Scotland, UK

Knot (Calidris canutus) walking in shallow water while looking for food in a small beach stream. Soroby. Argyll, Scotland, UK

Knot (Calidris canutus) . Soroby, Argyll, Scotland, UK

Knot (Calidris canutus). Soroby, Argyll, Scotland, UK

Large flock of waders, red knots (Calidris canutus) and oystercatchers (Haematopus ostralegus) above the alluvial area Wash, Snettisham, Norfolk, England

Large flock of waders, red knots (Calidris canutus) and oystercatchers (Haematopus ostralegus) above the alluvial area Wash, Snettisham, Norfolk, England