Updated: Jul 14, 2022
The giant swallowtail (Papilio cresphontes) is the largest butterfly in North America. It is abundant through many parts of eastern North America; populations from western North America and down into Panama are now considered to belong to a different species, Papilio rumiko. Wikipedia
You can help scientists understand how climate change is impacting this species by using the phenophase guide to observe its lifecycle in Nature's Notebook.