Butterfly flight seasons in Maine from 26,751 research-grade iNaturalist observations. July has the most activity.
By month
Maine butterfly calendar (top 40)
Fewer More observations (relative to each row's peak month)
Activity by month (all species)
Most-photographed butterflies in Maine
Monarch
American Lady
Great Spangled Fritillary
Canadian Tiger Swallowtail
Small White
Common Ringlet
Red Admiral
Mourning Cloak
Common Wood-Nymph
American Copper
Dun Skipper
Northern Crescent
Silver-spotted Skipper
Clouded Sulphur
Atlantis Fritillary
Hobomok Skipper
