Butterfly flight seasons in Utah from 22,505 research-grade iNaturalist observations. July has the most activity.
By month
Utah butterfly calendar (top 40)
Fewer More observations (relative to each row's peak month)
Activity by month (all species)
Most-photographed butterflies in Utah
Painted Lady
Monarch
Small White
Weidemeyer's Admiral
California Tortoiseshell
Two-tailed Swallowtail
Mourning Cloak
Western Tiger Swallowtail
Western Pygmy-Blue
Anise Swallowtail
Gray Hairstreak
Checkered White
Arizona Sister
Common Checkered-Skipper
Woodland Skipper
Field Crescent
