Based on 2,571 research-grade iNaturalist observations in Michigan, Black Swallowtail is most often recorded in July; in Michigan it behaves like a summer visitor / breeder. It ranks #6 among butterflies recorded in the state in our data.
Papilio polyxenes
Black Swallowtail in Michigan by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in Michigan in July
Monarch
Red Admiral
Eastern Tiger Swallowtail
Northern Pearly-eye
Silver-spotted Skipper
Red-spotted Admiral
Small White
Spicebush Swallowtail
Places to look in Michigan
Wilderness AreaIsle Royale National Park
Botanical GardenBelle Isle Park
Botanical GardenFrederik Meijer Gardens & Sculpture Park
Botanical GardenLeila Arboretum
Botanical GardenNichols Arboretum
State ParkGrand Mere State Park
FAQ
When does Black Swallowtail appear in Michigan?
Mainly June–September, with the most records in July.
How common is Black Swallowtail in Michigan?
It ranks #6 by number of iNaturalist observations among butterflies in Michigan (2,571 records in our sample).