Based on 1,848 research-grade iNaturalist observations in Missouri, Black Swallowtail is most often recorded in September; in Missouri it behaves like a summer visitor / breeder. It ranks #12 among butterflies recorded in the state in our data.
Papilio polyxenes
Black Swallowtail in Missouri 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 Missouri in September
Monarch
Common Buckeye
Painted Lady
Silver-spotted Skipper
Huron Skipper
Pearl Crescent
Eastern Tailed-Blue
Hackberry Emperor
Places to look in Missouri
Botanical GardenMissouri Botanical Garden
National ForestMark Twain National Forest
Botanical GardenMissouri State Arboretum
State ParkBig Oak Tree State Park
State ParkTable Rock State Park
State ParkMark Twain Birthplace State Historic Site
FAQ
When does Black Swallowtail appear in Missouri?
Mainly June–September, with the most records in September.
How common is Black Swallowtail in Missouri?
It ranks #12 by number of iNaturalist observations among butterflies in Missouri (1,848 records in our sample).