This preliminary list is a result of opportunistic collecting by staff members of the Milwaukee Public Museum's Invertebrate Zoology Section at the UWM Cedar-Sauk Field Station during the past nine years. A total of 55 butterfly (Papilionoidea) and skipper (Hesperioidea) species have been collected in various habitats at the Field Station with one additional species, Lycaena epixanthe found in the Sapa-Black Spruce Bog. More intensive collecting should turn up additional species since the Field Station lies within the geographic ranges of over 90 butterflies and skippers according to recent distribution maps (Opler and Krizek, 1984; and Scott, 1986). Of course, specific habitat requirements and other factors will exclude some of these species from occurring at the site.
Borkin, S.S.1986. A preliminary list of butterflies and skippers from the UWM Field Station. 19(2): 14.