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?
Monarch Jan 1 May 3
Orange Sulphur Jan 1 Mar 31
Silver-spotted Skipper Mar 20 May 6
Frosted Elfin Mar 23 Apr 12
American Copper Mar 29 Apr 23
Variegated Fritillary Apr 4 May 2
Common Sootywing Apr 15 May 11
Harvester Apr 15 May 10
Columbine Duskywing Apr 15 May 17
Cobweb Skipper Apr 15 May 2
Persius Duskywing Apr 15 May 9
Dreamy Duskywing Apr 17 May 8
West Virginia White Apr 18 May 22
Red-disked Alpine Apr 23 May 15
Gorgone Checkerspot Apr 24 May 18
Giant Swallowtail Apr 25 May 20
Western Tailed-Blue Apr 27 May 23
Chryxus Arctic Apr 28 May 20
Mottled Duskywing Apr 28 May 22
Canadian Tiger Swallowtail May 1 May 25
Funereal Duskywing May 1 Jul 13
Pepper and Salt Skipper May 3 May 28
Frigga Fritillary May 4 May 23