| Species | Sites Reporting |
|---|---|
| Common/Orange Sulphur | 10 |
| Monarch | 9 |
| Eastern Tailed Blue | 9 |
| Cabbage White | 9 |
| Eastern Tiger Swallowtail | 9 |
| Spring/Summer Azure | 9 |
| European Skipper | 8 |
| Red Admiral | 8 |
| Mourning Cloak | 8 |
| Pearl Crescent | 7 |
| Black Swallowtail | 6 |
| Great Spangled Fritillary | 6 |
| Question Mark | 6 |
| Little Wood Satyr | 5 |
| Silver Spotted Skipper | 5 |
| Red-Spotted Purple | 5 |
| Viceroy | 4 |
| Peck's Skipper | 4 |
| Tawny Edge | 3 |
| Meadow Fritillary | 3 |
| Eyed Brown | 3 |
| Common Wood Nymph | 3 |
| Eastern Comma | 3 |
| Coral Hairstreak | 3 |
| American Painted Lady | 3 |
| Buckeye | 3 |
| Baltimore Checkerspot | 2 |
| Black Dash | 2 |
| Mulberrywing | 2 |
| Acadian Hairstreak | 2 |
| Banded Hairstreak | 2 |
| Least Skipper | 2 |
| Silvery Checkerspot | 2 |
| Hobomok Skipper | 2 |
| Broadwinged Skipper | 2 |
| Striped Hairstreak | 2 |
| Long Dash | 2 |
| Northern Pearly-eye | 2 |
| Broken Dash | 2 |
| Dion Skipper | 2 |
| Aphrodite | 1 |
| American Copper | 1 |
| Regal Fritillary | 1 |
| Northern Cloudywing | 1 |
| Great Gray Copper | 1 |
| Hackberry Butterfly | 1 |
| Checkered White | 1 |
| Purplish Copper | 1 |
| Little Glassywing | 1 |
| Crossline Skipper | 1 |
| Spicebush Swallowtail | 1 |
| Edwards Hairstreak | 1 |
| Variegated Fritillary | 1 |
Illinois Butterfly Monitoring Network
The Illinois Butterfly Monitoring Network engages citizen scientists in the process of collecting quantitative data on butterfly populations.