Butterfly flight seasons in Maryland from 138,550 research-grade iNaturalist observations. August has the most activity.
By month
Maryland butterfly calendar (top 40)
Fewer More observations (relative to each row's peak month)
Activity by month (all species)
Most-photographed butterflies in Maryland
Eastern Tiger Swallowtail
Monarch
Huron Skipper
Silver-spotted Skipper
Pearl Crescent
Zabulon Skipper
Eastern Tailed-Blue
Common Buckeye
Small White
Spicebush Swallowtail
Variegated Fritillary
Zebra Swallowtail
Black Swallowtail
Red Admiral
Great Spangled Fritillary
Peck's Skipper
