Based on 18,284 research-grade iNaturalist observations in Texas, Hackberry Emperor is most often recorded in April; in Texas it behaves like a summer visitor / breeder. It ranks #11 among butterflies recorded in the state in our data.
Asterocampa celtis
Hackberry Emperor 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 April

Common Buckeye

Monarch

Red Admiral

Pipevine Swallowtail

Gray Hairstreak

Variegated Fritillary
Checkered White

Orange Sulphur
Places to look in Texas
Dinosaur Valley State Park
San Antonio Botanical Garden
Garner State Park
State ParkBrazos Bend State Park
Pedernales Falls State Park
Enchanted Rock State Natural Area
FAQ
When does Hackberry Emperor appear in Texas?
Mainly April–October, with the most records in April.
How common is Hackberry Emperor in Texas?
It ranks #11 by number of iNaturalist observations among butterflies in Texas (18,284 records in our sample).