Many residents in 亚洲天堂 Lake have noticed these yellow butterflies lately. Although many believe they are monarch butterflies, these are in fact the Canadian tiger swallowtail (papilio canadensis), a very common species in Canada.
This butterfly is found in all provinces and territories. This species has only one generation per year, usually appearing in mid-May and flying to late July depending on latitude.
Thanks to Jane Skeleton for this photo.