Based on 1,759 research-grade iNaturalist observations in Louisiana, Eastern Giant Swallowtail is most often recorded in September; in Louisiana it behaves like a summer visitor / breeder. It ranks #5 among butterflies recorded in the state in our data.
Heraclides cresphontes
Eastern Giant Swallowtail in Louisiana 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 Louisiana in September
Gulf Fritillary
Long-tailed Skipper
Common Buckeye
Monarch
Viceroy
Spicebush Swallowtail
Fiery Skipper
Cloudless Sulphur
Places to look in Louisiana
State ParkFort Jesup
National ForestKisatchie National Forest
State ParkChemin-A-Haut State Park
State ParkSt. Bernard State Park
State ParkBayou Segnette State Park
State ParkLake Bruin State Park
FAQ
When does Eastern Giant Swallowtail appear in Louisiana?
Mainly March–October, with the most records in September.
How common is Eastern Giant Swallowtail in Louisiana?
It ranks #5 by number of iNaturalist observations among butterflies in Louisiana (1,759 records in our sample).