Based on 6,233 research-grade iNaturalist observations in Ohio, Black Swallowtail is most often recorded in August; in Ohio it behaves like a summer visitor / breeder. It ranks #6 among butterflies recorded in the state in our data.
Papilio polyxenes
Black Swallowtail in Ohio 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 Ohio in August
Monarch
Eastern Tiger Swallowtail
Zabulon Skipper
Silver-spotted Skipper
Pearl Crescent
Peck's Skipper
Spicebush Swallowtail
Hackberry Emperor
Places to look in Ohio
Botanical GardenCincinnati Zoo and Botanical Garden
Botanical GardenChadwick Arboretum
National ForestWayne National Forest
Botanical GardenCox Arboretum and Gardens MetroPark
State ParkHocking Hills State Park
State ParkMaumee Bay State Park
FAQ
When does Black Swallowtail appear in Ohio?
Mainly June–September, with the most records in August.
How common is Black Swallowtail in Ohio?
It ranks #6 by number of iNaturalist observations among butterflies in Ohio (6,233 records in our sample).