Connecticut Butterfly Flight Periods

When and where to find butterflies across the state

This interactive guide shows when each butterfly species is active in Connecticut, based on community observations from iNaturalist. Use the date picker to see what's flying any week of the year, or browse the flight period calendar to plan your outings. Click on any species name to view its iNaturalist observations in Connecticut — a great way to find out where to look. Filter by county to see what's been spotted near you.

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