PIERSMA T (1987) Current research: Puzzling Knots- migration problems. LIMOSA 60 (2): 101-101.

Red Knot Calidris canutus Knots fascination has a number return all sorts of bird researchers and various countries together, to migration together the of these migratory perfect mapping. in 1976, besehreven (Ardea 64: 22-47) that in Europe wintering Red Knots in Greenland and a NOCanada include breeding population (subspecies islandica), while birds in western and southern Africa from Siberia spend the winter coming (canutus).

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