Based on 1,597 research-grade iNaturalist observations in Indiana, Black Swallowtail is most often recorded in August; in Indiana it behaves like a summer visitor / breeder. It ranks #8 among butterflies recorded in the state in our data.
Papilio polyxenes
Black Swallowtail in Indiana 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 Indiana in August
Monarch
Eastern Tiger Swallowtail
Silver-spotted Skipper
Hackberry Emperor
Common Buckeye
Spicebush Swallowtail
Zabulon Skipper
Pearl Crescent
Places to look in Indiana
State ParkTurkey Run State Park
State ParkBrown County State Park
State ParkProphetstown State Park
National ForestHoosier National Forest
State ParkMounds State Park
State ParkFalls of the Ohio State Park
FAQ
When does Black Swallowtail appear in Indiana?
Mainly July–September, with the most records in August.
How common is Black Swallowtail in Indiana?
It ranks #8 by number of iNaturalist observations among butterflies in Indiana (1,597 records in our sample).