Knot Bird Calidris canutus tundra river Arctic Cordillera bank sand beach sea Wildlife nature animal wild Outdoor
Knot, Calidris canutus (just Knot in Europe), is a medium sized shorebird which breeds in tundra and the Arctic Cordillera in the far north of Canada, Europe, and Russia. Birds bred in north America migrate to coastal areas in Europe and South America, while birds bred in Europe migrate to Africa, Papua New Guinea, Australia and New Zealand (see distribution map). This species forms enormous flocks in winter. Knot nests on the ground, near water, and usually inland. The female lays 3 to 4 eggs in a shallow scrape lined with leaves and moss. Both parents incubate the eggs, but the female leaves before the young fledge. After the young have fledged the male begins his migration south and the young make their first migration on their own. On the breeding grounds, Knots eat mostly spiders, arthropods, and larvae obtained by surface pecking, and on the wintering grounds they eat a variety of hard-shelled prey such as bivalves, gastropods and small crabs that are ingested whole and crushed by a muscular stomach. Knot is 23-26 cm long with a 47-53 cm wingspan. It has short dark legs and a medium thin dark bill. The body is mottled grey on top with a cinnamon face, throat and breast and light-coloured rear belly. In winter the plumage becomes uniformly pale grey. canutus, islandica and piersmai are the “darker” subspecies. rogersi has a lighter belly than either roselaari or piersmai, and rufa is the lightest in overall plumage. The weight varies with subspecies, but is between 100 and 200 g. Red Knots can double their weight prior to migration.
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Photo credit: © 19th era / Alamy / Afripics
License: Licensed
Model Released: No
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