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.
Giant Tiger Swallowtail Phenophase Guide
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