Hyalophora columbia (Smith) has been collected in 12 Wisconsin counties, primarily in the north-central region. The adult flight season peaks during the second week of June. Hyalophora cecropia (L.) was found to occur in many of the columbia localities, and to be active at the same time as columbia. Despite this overlap, natural hybrids were very rarely seen.
Ferge, Leslie A.
"Distribution and Hybridization of Hyalophora Columbia (Lepidoptera: Saturniidae) in Wisconsin,"
The Great Lakes Entomologist, vol 16
Available at: https://scholar.valpo.edu/tgle/vol16/iss3/1