Butterfly flight seasons in Iowa from 19,132 research-grade iNaturalist observations. August has the most activity.
By month
Iowa butterfly calendar (top 40)
Fewer More observations (relative to each row's peak month)
Activity by month (all species)
Most-photographed butterflies in Iowa
Monarch
Red Admiral
Painted Lady
Silver-spotted Skipper
Eastern Tiger Swallowtail
Black Swallowtail
Small White
Pearl Crescent
Hackberry Emperor
Great Spangled Fritillary
Eastern Tailed-Blue
Common Buckeye
Eastern Comma
Viceroy
Orange Sulphur
Question Mark
