(excerpt) Although Forficula auricularia Linnaeus, the European Earwig, has been known to occur in Ontario, Canada since prior to 1937 (Vickery and Kevan, 1967), invasion of Michigan by this species is of more recent date. A specimen in the University of Michigan Museum of Zoology was taken at Lansing in 1948 and, judging from specimens at hand, the species was fairly common there by 1964. In 1966, Thomas E. Moore, of the Museum of Zoology, took a number of specimens at Beulah in Benzie County and informed me that the earwig was rather abundant on common milkweed. Since that time there appears to have been an explosive build up of populations in the northwestern part of the state. Auricularia is reported as occurring in "great numbers" around Benzonia, Benzie County and in Charlevoix, Charlevoix County where they have been observed in numbers approaching "tens of thousands." I have also seen specimens from Missaukee County, Harbor Springs in Emmet County, Alpena in Alpena County, and Detroit, Wayne County. An undocumented report indicates that the species was observed in 1971 in large numbers at Big Rapids, Mecosta County.
Cantrall, Irving J.
"Forficula Auricularia L. (Dermaptera: Forficulidae) in Michigan,"
The Great Lakes Entomologist, vol 5
Available at: https://scholar.valpo.edu/tgle/vol5/iss3/12