1868 Barn Owl Guilford, Sachem's Head 1889 Baird's Sandpiper New Haven Harbor 1945 Canvasback Clinton 1945 Common Tern Old Saybrook, Fenwick 1945 Snowy Owl Old Saybrook, Fenwick 1945 Whip-poor-will Naugatuck 1986 Baltimore Oriole Ridgefield 1986 Boreal Chickadee Groton 1991 Broad-winged Hawk Waterford, Milstone Pt. 1992 Eurasian Wigeon Easton, Aspetuck Reservoir 1996 American White Pelecan Guilford 1999 Harlequin Duck Stamford, Cove Is. Park Warblers reported Black-throated Blue Warbler Blackpoll Warbler Northern Parula