June 22 2019
Cracker creek area
C. Guppy wrote this about a white i posted on inaturalist:Although the photos are very distant and not sharp, the second photo shows the upper forewing wing pattern characteristic of a female P. marginalis. Southern Yukon has 3 species of Pieris - P. angelika, P. marginalis, and P. oleraciea. P. oleracea would have almost no wing pattern, so that eliminates that species. P. angelika females have quite extensive black upper forewing pattern (unlike the photo), and P. marginalis females have grey upper forewing pattern (range from relatively little pattern (as in this case) to extensive grey pattern.
