Based on 19,784 research-grade iNaturalist observations in Texas, Black Swallowtail is most often recorded in May; in Texas it behaves like a seasonal. It ranks #10 among butterflies recorded in the state in our data.
Papilio polyxenes
Black Swallowtail in Texas 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 Texas in May
Gray Hairstreak
Pipevine Swallowtail
Common Buckeye
Monarch
Variegated Fritillary
Gulf Fritillary
Pearl Crescent
Question Mark
Places to look in Texas
State ParkDinosaur Valley State Park
Botanical GardenSan Antonio Botanical Garden
State ParkGarner State Park
State ParkBrazos Bend State Park
State ParkPedernales Falls State Park
State ParkEnchanted Rock State Natural Area
FAQ
When does Black Swallowtail appear in Texas?
Mainly April–July, with the most records in May.
How common is Black Swallowtail in Texas?
It ranks #10 by number of iNaturalist observations among butterflies in Texas (19,784 records in our sample).