Based on 4,401 research-grade iNaturalist observations in Texas, Western Giant Swallowtail is most often recorded in October; in Texas it behaves like a seasonal. It ranks #49 among butterflies recorded in the state in our data.
Heraclides rumiko
Western Giant 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 October
Monarch
Gulf Fritillary
Queen
Fiery Skipper
Gray Hairstreak
Common Buckeye
Pipevine Swallowtail
American Snout
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 Western Giant Swallowtail appear in Texas?
Mainly July–November, with the most records in October.
How common is Western Giant Swallowtail in Texas?
It ranks #49 by number of iNaturalist observations among butterflies in Texas (4,401 records in our sample).