Buff-Breasted Sandpiper (Calidris subruficollis) September 18, 2018 640 × 507 Buff-Breasted Sandpiper (Calidris subruficollis) Buff-breasted Sandpiper (Calidris subruficollis), August, Long Island. c. Sy Schiff. Migrant. DECLINING. Late August, Long Island, New York. Grasslands. Migrant. DECLINING.