Butterfly flight seasons in District of Columbia from 10,039 research-grade iNaturalist observations. September has the most activity.
By month
District of Columbia butterfly calendar (top 40)
Fewer More observations (relative to each row's peak month)
Activity by month (all species)
Most-photographed butterflies in District of Columbia
Huron Skipper
Monarch
Eastern Tiger Swallowtail
Small White
Silver-spotted Skipper
Zabulon Skipper
Common Buckeye
Eastern Tailed-Blue
Red Admiral
Fiery Skipper
Pearl Crescent
Spicebush Swallowtail
Least Skipper
Variegated Fritillary
Painted Lady
Question Mark
