20 YEARS AGO July-August 1999 An Audubon's Shearwater was found dead at Muskeget Island on July 5. Plum Island hosted an American Avocet and a male Ruff between August 9–11. The Red-necked Stint found there on June 26 continued to July 2. A Sabine's Gull was sitting on South Beach, Chatham, on August 26. A White-winged Dove visited a feeder in Marshfield in July. For the third year a Philadelphia Vireo returned to the Oxbow NWR in Harvard. This bird was recorded singing Warbling and Philadelphia vireo songs. Best nesters: A family of Pied-billed Grebes at Nantucket constituted the first confirmed nesting record for the species on the island, while American Coots nested for the second time on the island. 40 YEARS AGO July-August 1979 A Red-necked Grebe found dead at Wellfleet Bay Wildlife Sanctuary was the first August record for the species in the state. A White Ibis continued into July in the Newburyport area. Two Bar-tailed Godwits were present this period: one on Monomoy in July and August and one at Plum Island on August 7–10. A breeding plumage Curlew Sandpiper was on Nantucket, August 4–5. Monomoy boasted a record 360+ Whimbrels on August 1, and 86 Stilt Sandpipers on August 8. Upwards of 60 Western Sandpipers were in Nauset Bay at the end of August. A Bridled Tern was seen flying past Sandy Neck during a nor'easter on August 12. Best sighting: a dead Least Sandpiper chick found at Monomoy on July 12. This is the first breeding record in the Lower 48—at least 500 miles from their closest breeding site in Sable Island, Nova Scotia.