| Species | Butterflies | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 |
|---|---|---|---|---|---|---|---|---|---|
| Acadian Hairstreak | 14 | 7 | 0 | 2 | 0 | 3 | 1 | 1 | 0 |
| Alfalfa Butterfly | 333 | 4 | 7 | 8 | 99 | 143 | 16 | 46 | 10 |
| American Copper | 24 | 0 | 5 | 5 | 8 | 3 | 1 | 2 | 0 |
| American Painted Lady | 20 | 0 | 2 | 6 | 2 | 2 | 7 | 0 | 1 |
| Appalachian Eyed Brown | 54 | 1 | 0 | 6 | 1 | 10 | 20 | 10 | 6 |
| Baltimore | 46 | 4 | 0 | 0 | 0 | 1 | 24 | 14 | 3 |
| Banded Hairstreak | 66 | 17 | 0 | 5 | 2 | 2 | 5 | 0 | 35 |
| Black Dash | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Black Swallowtail | 71 | 1 | 12 | 8 | 29 | 6 | 5 | 5 | 5 |
| Broad-winged Skipper | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Bronze Copper | 8 | 0 | 5 | 0 | 1 | 0 | 2 | 0 | 0 |
| Buckeye | 20 | 0 | 0 | 1 | 9 | 10 | 0 | 0 | 0 |
| Cabbage White | 1043 | 192 | 35 | 46 | 203 | 55 | 289 | 28 | 195 |
| Clouded Sulphur | 500 | 22 | 19 | 13 | 111 | 147 | 113 | 46 | 29 |
| Common Sootywing | 14 | 0 | 3 | 4 | 2 | 1 | 1 | 3 | 0 |
| Coral Hairstreak | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Crossline Skipper | 5 | 0 | 0 | 0 | 1 | 2 | 1 | 1 | 0 |
| Delaware Skipper | 136 | 10 | 2 | 3 | 19 | 28 | 15 | 44 | 15 |
| Dion Skipper | 15 | 0 | 0 | 1 | 0 | 0 | 0 | 10 | 4 |
| Dreamy Duskywing | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dun Skipper | 24 | 0 | 0 | 10 | 0 | 6 | 6 | 2 | 0 |
| Eastern Comma | 21 | 6 | 0 | 1 | 2 | 1 | 9 | 0 | 2 |
| Eastern-tailed Blue | 33 | 0 | 0 | 2 | 7 | 4 | 14 | 5 | 1 |
| European Skipper | 515 | 93 | 359 | 9 | 2 | 14 | 14 | 10 | 14 |
| Eyed Brown | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Fiery Skipper | 5 | 0 | 0 | 1 | 4 | 0 | 0 | 0 | 0 |
| Giant Swallowtail | 9 | 1 | 4 | 2 | 1 | 0 | 0 | 0 | 1 |
| Great Spangled Fritillary | 263 | 15 | 4 | 58 | 37 | 65 | 66 | 4 | 14 |
| Hackberry Butterfly | 16 | 2 | 6 | 0 | 0 | 1 | 4 | 0 | 3 |
| Hickory Hairstreak | 2 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
| Hobomok's Skipper | 13 | 0 | 12 | 0 | 0 | 0 | 0 | 0 | 1 |
| Horace Duskywing | 7 | 0 | 0 | 0 | 0 | 6 | 1 | 0 | 0 |
| Least Skipper | 74 | 5 | 20 | 3 | 0 | 2 | 20 | 7 | 17 |
| Little Glassywing | 21 | 0 | 0 | 4 | 5 | 4 | 6 | 1 | 1 |
| Little Wood Satyr | 216 | 23 | 75 | 4 | 11 | 57 | 14 | 8 | 24 |
| Long Dash | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Meadow Fritillary | 12 | 2 | 0 | 2 | 5 | 0 | 3 | 0 | 0 |
| Milbert's Tortoise Shell | 20 | 0 | 11 | 4 | 4 | 1 | 0 | 0 | 0 |
| Monarch | 157 | 16 | 20 | 10 | 30 | 5 | 60 | 4 | 12 |
| Mourning Cloak | 24 | 10 | 9 | 0 | 2 | 0 | 3 | 0 | 0 |
| Northern Broken Dash | 45 | 3 | 0 | 7 | 11 | 14 | 5 | 3 | 2 |
| Northern Cloudywing | 4 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 0 |
| Northern Pearly Eye | 9 | 0 | 0 | 1 | 1 | 3 | 2 | 0 | 2 |
| Painted Lady | 12 | 0 | 0 | 0 | 1 | 0 | 10 | 0 | 1 |
| Pearl Crescent | 902 | 6 | 36 | 517 | 174 | 84 | 26 | 50 | 9 |
| Peck's Skipper | 12 | 2 | 9 | 1 | 0 | 0 | 0 | 0 | 0 |
| Question Mark | 40 | 1 | 1 | 3 | 13 | 3 | 12 | 4 | 3 |
| Red Admiral | 274 | 1 | 21 | 10 | 16 | 17 | 192 | 4 | 13 |
| Red-spotted Purple | 23 | 0 | 17 | 2 | 2 | 0 | 0 | 2 | 0 |
| Silver-spotted Skipper | 137 | 12 | 17 | 6 | 10 | 42 | 22 | 7 | 21 |
| Silvery Checkerspot | 5 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 3 |
| Southern Cloudywing | 3 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Spicebush Swallowtail | 14 | 0 | 2 | 1 | 7 | 3 | 1 | 0 | 0 |
| Striped Hairstreak | 9 | 0 | 0 | 3 | 2 | 4 | 0 | 0 | 0 |
| Summer Azure | 116 | 11 | 0 | 5 | 54 | 12 | 27 | 1 | 6 |
| Tawny Edged Skipper | 18 | 9 | 4 | 0 | 2 | 0 | 0 | 2 | 1 |
| Tawny Emperor | 25 | 2 | 0 | 2 | 3 | 4 | 6 | 0 | 8 |
| Tiger Swallowtail | 38 | 4 | 10 | 1 | 8 | 5 | 4 | 1 | 5 |
| Variegated Fritillary | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Viceroy | 147 | 1 | 22 | 46 | 57 | 3 | 2 | 8 | 8 |
| White Colias | 27 | 0 | 0 | 0 | 8 | 15 | 2 | 2 | 0 |
| Wood Nymph | 300 | 4 | 0 | 70 | 22 | 25 | 31 | 91 | 57 |