Resources for Long-Distance Migration of Knots Calidris canutus islandica and C. c. canutus: How Broad Is the Temporal Exploitation Window of Benthic Prey in the Western and Eastern Wadden Sea?

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Abstract
In the course of each spring, two subspecies of knots Calidris canutus (islandica wintering in Europe and breeding in the Nearctic, and canutus wintering in wes...