Thirty-two (32) species of hawkmoths (Sphingidae) are reported from Grand Traverse and adjacent counties, Michigan, based on collecting carried out in 1979-1997 and an inventory of museum records.
Douglass, Andrew W.; Douglass, Christopher B.; and Douglass, John F.
"Hawkmoths (Lepidoptera: Sphingidae) Collected in Grand Traverse and Adjacent Counties, Michigan,"
The Great Lakes Entomologist, vol 34
Available at: https://scholar.valpo.edu/tgle/vol34/iss2/6