Based on 1,017 research-grade iNaturalist observations in Utah, Two-tailed Swallowtail is most often recorded in June; in Utah it behaves like a summer visitor / breeder. It ranks #6 among butterflies recorded in the state in our data.
Papilio multicaudata
Two-tailed Swallowtail in Utah 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 Utah in June
Western Tiger Swallowtail
Weidemeyer's Admiral
Small White
Monarch
Painted Lady
Checkered White
Mourning Cloak
Boisduval's Blue
Places to look in Utah
State ParkDead Horse Point State Park
State ParkGoosenecks State Park
State ParkGoblin Valley State Park
National ForestDixie National Forest
State ParkCoral Pink Sand Dunes State Park
State ParkKodachrome Basin State Park
FAQ
When does Two-tailed Swallowtail appear in Utah?
Mainly May–August, with the most records in June.
How common is Two-tailed Swallowtail in Utah?
It ranks #6 by number of iNaturalist observations among butterflies in Utah (1,017 records in our sample).