A Comprehensive Annotated List of the Butterflies
Chase Lake Butterfly Survey
The Swallowtails
Black Swallowtail Papilio polyxenes (Fabricius), 1775 Habitat: Gardens, prairie hilltops, always near Umbelliferae Larval food: Wild Umbelliferae, incl. Daucus, Zizea Adult flight: Two broods, May and July References: Royer 35, Opler & Krizek 44, Scott 171 Confirmed occurrences: 6 and 14 Jun 1995 on windswept prairie hilltops throughout S4, S9 and S10 in T142N R69W. Canadian Tiger Swallowtail Pterourus canadensis (Rothschild & Jordan), 1906 Habitat: Ash breaks, woodlands; often found on Apocynum blooms Larval food: Populus, Salix, possibly also Prunus Adult flight: One brood, early June References: Royer 37, Opler & Krizek 49, Scott 179 Confirmed occurrences: Not recorded at Chase Lake Complex in 1995, but possible occasional encounters during early June.
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