Red Knot (Calidris canutus) and Ruddy Turnstone (Arenaria interpres) September 23, 2019 1600 × 1280 NY Birds Gallery Red Knot (Calidris canutus) and Ruddy Turnstone (Arenaria interpres) and Ruddy Turnstone, Aug 2019, Napeague. Migrants. August, 2019. Napeague, New York. Shores. Migrants. The Red Knot is declining.