Based on 1,806 research-grade iNaturalist observations in Pennsylvania, Common Buckeye is most often recorded in September; in Pennsylvania it behaves like a seasonal. It ranks #18 among butterflies recorded in the state in our data.
Junonia coenia
Common Buckeye in Pennsylvania 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 Pennsylvania in September
Monarch
Huron Skipper
Small White
Eastern Tiger Swallowtail
Black Swallowtail
Peck's Skipper
Pearl Crescent
Variegated Fritillary
Places to look in Pennsylvania
National ForestAllegheny National Forest
State ParkPresque Isle State Park
Botanical GardenJenkins Arboretum
State ParkCherry Springs State Park
State ParkColton Point State Park
State ParkLeonard Harrison State Park
FAQ
When does Common Buckeye appear in Pennsylvania?
Mainly August–October, with the most records in September.
How common is Common Buckeye in Pennsylvania?
It ranks #18 by number of iNaturalist observations among butterflies in Pennsylvania (1,806 records in our sample).