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?
Eastern Pine Elfin Mar 14 Apr 16
Henry's Elfin Mar 15 Apr 8
Eastern Tailed-Blue Mar 18 Apr 10
Gray Comma Mar 18 Apr 17
'Spring' Spring Azure Mar 19 Apr 16
Pearl Crescent Mar 20 Apr 28
Silver-spotted Skipper Mar 20 May 7
Juvenal's Duskywing Mar 20 Apr 15
Falcate Orangetip Mar 22 Apr 9
Frosted Elfin Mar 23 Apr 14
Mustard White Mar 23 May 2
Brown Elfin Mar 24 Apr 16
Horace's Duskywing Mar 24 Apr 23
Gray Hairstreak Mar 24 Apr 19
Sachem Mar 28 May 14
Juniper Hairstreak Mar 28 Apr 21
Eastern Tiger Swallowtail Mar 29 Apr 18
American Copper Mar 29 Apr 25
Olympia Marble Mar 29 Apr 21
Spicebush Swallowtail Mar 29 Apr 25
Wild Indigo Duskywing Mar 30 Apr 23
Sleepy Duskywing Mar 30 Apr 26
White M Hairstreak Mar 31 Apr 18
Hoary Elfin Mar 31 Apr 23
Satyr Comma Apr 2 Apr 14