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? |
|---|---|---|---|
| Hobomok Skipper | May 7 | May 28 | 
|
| Silver-bordered Fritillary | May 8 | May 27 |
|
| Dusted Skipper | May 8 | May 21 |
|
| Gray Hairstreak | May 9 | Aug 5 |
|
| 'Karner' Melissa Blue | May 9 | Jun 1 |
|
| Common Ringlet | May 9 | May 31 |
|
| Northern Crescent | May 10 | May 29 |
|
| Viceroy | May 10 | May 31 |
|
| Jutta Arctic | May 10 | May 30 |
|
| Little Yellow | May 12 | Aug 2 |
|
| Northern Cloudywing | May 12 | May 31 |
|
| American Snout | May 13 | Jul 1 |
|
| Little Wood-Satyr | May 13 | May 31 |
|
| Arctic Skipper | May 14 | May 25 |
|
| Peck's Skipper | May 14 | Jun 1 |
|
| Gray Copper | May 15 | Jun 29 | – |
| Red-spotted Purple | May 15 | Jun 4 |
|
| White Admiral | May 16 | Jun 13 | – |
| Least Skipper | May 16 | Jun 10 |
|
| Tawny-edged Skipper | May 16 | Jun 8 |
|
| Pink-edged Sulphur | May 17 | Jun 14 | – |
| Purplish Copper | May 17 | May 31 | – |
| Indian Skipper | May 20 | Jun 3 | – |
| Long Dash | May 21 | Jun 12 | – |
| 'Summer' Spring Azure | May 24 | Jun 13 | – |
| Bog Fritillary | May 25 | Jun 11 | – |
| Red-spotted Admiral | May 25 | Jun 8 | – |
| Silvery Checkerspot | May 26 | Jun 10 | – |
| Harris' Checkerspot | May 26 | Jun 13 | – |
| Great Spangled Fritillary | May 27 | Jun 13 | – |