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Papilio glaucus / canadensis / appalachiensis
Golden brown with black & yellow stripes, blue spots.
Rural SW Pennsylvania
Thanks for the info. Always nice to learn a little more about all the critters around us.
The Two-tailed Tiger Swallowtail (http://www.butterfliesandmoths.org/speci...) is a Western species. Upon reaching full maturity, Tiger cats stop feeding, empty their gut, and begin wandering, which is accompanied by a dramatic change in color.