While commonly referred to as the ‘Old World swallowtail’, Papilio machaon has a very wide distribution, widest of any of the Papilionidae, covering most of the Palearctic and into western North America. Part of the species’ success is its tolerance for a variety of habitats and host plants. The butterfly can be found in forests, grasslands, hilltops, Alpine meadows, tundra, wetlands, disturbed areas, parks, and gardens.