Data from field observations from 1992 through 2006 and from museum specimens of adult Chauliognathus pensylvanicus (DeGeer) from Wisconsin are presented here, with information from the literature. Beetles were found using flowers of 183 species in 29 families growing outside cultivation in Wisconsin and in every Wisconsin county. All evidence supports the characterization of C. pensylvanicus as a prairie insect that also lives in other, early successional plant communities.
Williams, Andrew H.
"A Friend Unmasked: Notes on Chauliognathus Pensylvanicus (Coleoptera: Cantharidae) and the Nature of Natural History,"
The Great Lakes Entomologist, vol 39
Available at: https://scholar.valpo.edu/tgle/vol39/iss2/9