Based on 2,477 research-grade iNaturalist observations in Missouri, Spicebush Swallowtail is most often recorded in August; in Missouri it behaves like a summer visitor / breeder. It ranks #9 among butterflies recorded in the state in our data.
Papilio troilus
Spicebush 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 August
Monarch
Eastern Tiger Swallowtail
Common Buckeye
Hackberry Emperor
Silver-spotted Skipper
Pipevine Swallowtail
Black Swallowtail
Pearl Crescent
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 Spicebush Swallowtail appear in Missouri?
Mainly May–September, with the most records in August.
How common is Spicebush Swallowtail in Missouri?
It ranks #9 by number of iNaturalist observations among butterflies in Missouri (2,477 records in our sample).