Murphy's Point Provincial Park, Lanark Co., Ottawa
12 July 2018
In the Ottawa area, "true" or "pure" Canadian Tiger Swallowtails fly in the spring to early summer, and pure Eastern Tiger Swallowtails seem to be rare. However, a fresh population of tiger swallowtails appears every year in July, and they generally show hybrid morphological characters. Preliminary molecular studies indicate these are 60-80% P. canadensis and 20-40% P. glaucus. It's not fully understood how this is possible without P. glaucus in the area or very rare in the area. Additional studies are underway.
