Digestive organ size and behavior of red knots (Calidris Canutus) indicate the quality of their benthic food stocksShellfish dredging pushes a flexible avian top predator out of a marine protected areaDo Red Knots (Calidris canutus Islandica) routinely skip Iceland during southward migration?Foraging in a tidally structured environment by red knots (Calidris canutus): Ideal, but not free