Butterfly lookout

Which butterflies are newly emerging or arriving? Species in the list below have early sighting dates within 10 days of today. Early dates are often indicators of uncommonly warm weather, so the median date of first sighting is also listed.

Butterflies first seen around this week

Species Earliest sighting Median first sighting Seen this year?
Sachem Mar 28 May 14
Crossline Skipper May 14 May 30
Tawny Emperor May 20 Jun 21
Little Glassywing May 21 Jun 6
Bog Copper May 31 Jun 15
Delaware Skipper Jun 1 Jun 11
Striped Hairstreak Jun 3 Jun 20
Broad-winged Skipper Jun 3 Jun 22
Coral Hairstreak Jun 4 Jun 15
Two-spotted Skipper Jun 8 Jun 26
Northern Broken-Dash Jun 8 Jun 18
Sleepy Orange Jun 9 Aug 7
Greenish Blue Jun 9 Jun 21
Regal Fritillary Jun 9 Jun 28
Atlantis Fritillary Jun 12 Jun 29
Edwards' Hairstreak Jun 14 Jun 24
Mulberry Wing Jun 17 Jun 25
Hickory Hairstreak Jun 17 Jul 2
Gray Copper Jun 18 Jun 29
Dorcas Copper Jun 18 Jul 1
Black Dash Jun 20 Jul 2
Acadian Hairstreak Jun 21 Jul 1
Ottoe Skipper Jun 22 Jul 9
Dion Skipper Jun 23 Jul 3
Byssus Skipper Jun 23 Jul 8
Poweshiek Skipperling Jun 23 Jul 4