AIAI reconstruction created with Nano Banana 2 · 1K, grounded in the profile’s documented taxonomy, habitat, natural-history sources, and an open-license visual reference when available. It is an interpretive image, not documentary evidence. Image policy →

Red Knot
Playero Rojizo
Calidris canutus
The red knot or just knot (Calidris canutus) is a medium-sized shorebird which breeds in tundra and the Arctic Cordillera in the far north of Canada, Europe, and Russia. It is a large member of the Calidris sandpipers, second only to the great knot. Six subspecies are recognised. Their diet varies according to season; arthropods and larvae are the preferred food items at the breeding grounds, while various hard-shelled molluscs are consumed at other feeding sites at other times. North American breeders migrate to coastal areas in Europe and South America, while the Eurasian populations winter in Africa, Papua New Guinea, Australia, and New Zealand. This species forms enormous flocks when not breeding.
Sound archive
Hear its voice
Explore real songs and calls. The spectrogram turns each sound into a visual trace of time and frequency.

Play: flight call by Sonothèque ADVL
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Sound recorded by Sonothèque ADVL · XC1088498 · CC0 1.0. Visualization by Stichting Xeno-canto voor Natuurgeluiden.
Every recording retains the creator, catalogue number, and license published by Xeno-canto. Metadata via GBIF ↗
Island profile
About the Red Knot
The red knot or just knot (Calidris canutus) is a medium-sized shorebird which breeds in tundra and the Arctic Cordillera in the far north of Canada, Europe, and Russia. It is a large member of the Calidris sandpipers, second only to the great knot. Six subspecies are recognised. Their diet varies according to season; arthropods and larvae are the preferred food items at the breeding grounds, while various hard-shelled molluscs are consumed at other feeding sites at other times. North American breeders migrate to coastal areas in Europe and South America, while the Eurasian populations winter in Africa, Papua New Guinea, Australia, and New Zealand. This species forms enormous flocks when not breeding.
Conservation
Near Threatened
IUCN NT; ESA Threatened
- Global IUCN
- NT
- Puerto Rico DNER
- No current listing in source crosswalk
- Federal ESA
- Threatened
- Critical habitat
- No in cited 2026 table
Natural history
How it lives
- Habitat
- Mudflats; beaches; salt flats; tidal shallows
- Elevation
- 0–300 m
- Nest
- Scrape · Ground
- Clutch
- 3–4 eggs
- Social behavior
- Social / flocking; Singly and pairs
Keep exploring
This bird belongs to 8 paths through the atlas.
Evidence trail
Sources, media & further reading
Research note: Federal listing applies to rufa subspecies; keep trinomial







