Gull-billed Tern records for Illinois northern Illinois May 30, 1997, Waukegan Municipal Beach, Lake County (Eric Walters) (IORC 1997.011; EW) (MJIB 6:4:122-123) (MJIB 6:4:150) (MJIB 7:2:57) August 10-15, 1960, Gillson Park, Cook County (Bob Russell, Stan Hedeen) (Russell, Hedeen and Easterberg 1962) (IAB 144:19)       August 10, 1960, Gillson Park, Cook County (Bob Russell, Stan Hedeen) (Mlodinow 1984) (Bohlen 1989) (MJIB 6:4:122-123)      August 15, 1960, Gillson Park, Cook County (Bob Russell, Stan Hedeen) August 13, 1967, Waukegan Beach, Lake County (Kim Eckert, Bob Russell) (IAB 144:19) (AFN 21:5:578) (MJIB 6:4:122-123)      (Bohlen 1978) (Mlodinow 1984) (Bohlen 1989) August 15-26, 1959, Lake Calumet, Cook County (Harold Fetter, Helen Lane) (AFN 14:40) (IAB 144:19) (MJIB 6:4:122-123)      August 15, 1959, Lake Calumet, Cook County (Harold Fetter, Helen Lane) (Bohlen 1978) (Mlodinow 1984) (Bohlen 1989)      August 26, 1959, Lake Calumet, Cook County (Harold Fetter, Helen Lane) central Illinois July 3, 2005, Chautauqua NWR, Mason County (Kevin Richmond) (IBET) (pending IORC review) Historical comments: Nelson (1876) "An exceedingly rare visitant during summer".

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