Some links about piping plovers in Wisconsin
2022, UW-Green Bay working at Cat Island to monitor plovers: https://www.uwgb.edu/UWGBCMS/media/Biodiversity/files/CCB-Summer-22-Newsletter.pdf#page=11
2020, history of piping plovers in Wisconsin going back to 2009: https://ecosphere-documents-production-public.s3.amazonaws.com/sams/public_docs/species_nonpublish/3383.pdf#page=52
2011, Attempts to increase Piping Plover populations: https://www.foxrivernrda.org/wp-content/uploads/2011/12/Restoration-Progress-Report.pdf#page=127
1983, history of piping plovers in Wisconsin: https://longpointbiosphere.com/download/Birds/Piping-Plover-in-Great-Lakes-Region-Russell-1983.pdf#page=2