The eastern tiger swallowtail butterfly, Papilio glaucus L., is polyphagous, and has been reported to feed upon plant species of at least 13 families (Scudder 1889, Teitz 1972). The Canadian subspecies, P. glaucus canadensis Rothschild and Jordan, is generally believed to be univoltine, to be devoid of the genetic capacity for dark morph females, and to have morphologically distinct characteristics from the southern subspecies, P. glaucus glaucus L.
Scriber, J. M.; Lintereur, G. L.; and Evans, M. H.
"Foodplant Suitabilities and a New Oviposition Record for Papilio Glaucus Canadensis (Lepidoptera: Papilionidae) in Northern Wisconsin and Michigan,"
The Great Lakes Entomologist: Vol. 15
, Article 6.
Available at: http://scholar.valpo.edu/tgle/vol15/iss1/6