| Species | Butterflies | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Acadian Hairstreak | 25 | 0 | 0 | 0 | 1 | 2 | 5 | 0 | 0 | 0 | 2 | 15 |
| Alfalfa Butterfly | 88 | 0 | 2 | 1 | 0 | 8 | 13 | 7 | 7 | 9 | 39 | 2 |
| American Copper | 5 | 0 | 1 | 0 | 1 | 0 | 0 | 2 | 0 | 1 | 0 | 0 |
| American Painted Lady | 57 | 1 | 1 | 5 | 9 | 3 | 3 | 28 | 2 | 1 | 3 | 1 |
| Aphrodite | 3 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 |
| Appalachian Eyed Brown | 41 | 0 | 9 | 3 | 8 | 7 | 3 | 0 | 3 | 0 | 4 | 4 |
| Baltimore | 545 | 0 | 13 | 63 | 51 | 43 | 56 | 115 | 74 | 65 | 34 | 31 |
| Banded Hairstreak | 52 | 0 | 0 | 3 | 10 | 3 | 20 | 1 | 0 | 0 | 12 | 3 |
| Black Dash | 3 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Black Swallowtail | 32 | 11 | 5 | 0 | 0 | 3 | 1 | 0 | 4 | 6 | 0 | 2 |
| Bronze Copper | 16 | 0 | 0 | 0 | 0 | 2 | 3 | 2 | 4 | 2 | 2 | 1 |
| Buckeye | 2 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
| Cabbage White | 861 | 3 | 22 | 13 | 24 | 184 | 32 | 71 | 98 | 217 | 67 | 130 |
| Clouded Sulphur | 559 | 0 | 2 | 21 | 12 | 185 | 20 | 9 | 51 | 9 | 113 | 137 |
| Coral Hairstreak | 35 | 0 | 0 | 3 | 8 | 3 | 6 | 1 | 4 | 3 | 6 | 1 |
| Crossline Skipper | 11 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 2 | 3 | 3 |
| Delaware Skipper | 265 | 0 | 0 | 15 | 29 | 31 | 15 | 2 | 37 | 3 | 39 | 94 |
| Dion Skipper | 21 | 0 | 0 | 3 | 0 | 2 | 2 | 0 | 3 | 0 | 3 | 8 |
| Dreamy Duskywing | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dun Skipper | 5 | 0 | 0 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Eastern Comma | 51 | 0 | 1 | 0 | 2 | 7 | 10 | 6 | 7 | 1 | 9 | 8 |
| Eastern-tailed Blue | 43 | 0 | 0 | 0 | 0 | 13 | 4 | 1 | 1 | 3 | 2 | 19 |
| Edward's Hairstreak | 17 | 0 | 0 | 1 | 10 | 0 | 5 | 0 | 0 | 0 | 1 | 0 |
| European Skipper | 3561 | 59 | 752 | 401 | 76 | 131 | 504 | 372 | 345 | 643 | 180 | 98 |
| Eyed Brown | 322 | 4 | 4 | 12 | 3 | 0 | 48 | 38 | 56 | 108 | 18 | 31 |
| Giant Swallowtail | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Gray Comma | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 3 |
| Great Spangled Fritillary | 876 | 0 | 3 | 62 | 75 | 126 | 143 | 25 | 71 | 69 | 103 | 199 |
| Hackberry Butterfly | 31 | 1 | 2 | 4 | 0 | 0 | 5 | 0 | 4 | 12 | 2 | 1 |
| Harris' Checkerspot | 9 | 2 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Hickory Hairstreak | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
| Hobomok's Skipper | 82 | 17 | 9 | 0 | 0 | 6 | 6 | 10 | 16 | 12 | 3 | 3 |
| Juvenal's Duskywing | 5 | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Least Skipper | 60 | 2 | 4 | 0 | 0 | 2 | 3 | 13 | 8 | 11 | 5 | 12 |
| Little Glassywing | 36 | 0 | 0 | 3 | 2 | 5 | 8 | 1 | 3 | 0 | 7 | 7 |
| Little Wood Satyr | 745 | 58 | 50 | 47 | 37 | 76 | 68 | 64 | 107 | 107 | 66 | 65 |
| Little Yellow | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| Long Dash | 35 | 0 | 0 | 0 | 0 | 1 | 3 | 2 | 6 | 12 | 2 | 9 |
| Meadow Fritillary | 16 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 11 | 1 | 0 | 2 |
| Milbert's Tortoise Shell | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 2 | 0 |
| Monarch | 26 | 0 | 1 | 9 | 0 | 0 | 2 | 3 | 1 | 5 | 3 | 2 |
| Mourning Cloak | 27 | 2 | 2 | 3 | 4 | 4 | 3 | 2 | 4 | 3 | 0 | 0 |
| Mulberry Wing | 80 | 0 | 0 | 10 | 15 | 9 | 0 | 0 | 0 | 0 | 18 | 28 |
| Mustard White | 16 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 1 | 1 | 1 | 5 |
| Northern Broken Dash | 196 | 0 | 1 | 10 | 13 | 11 | 13 | 7 | 41 | 6 | 61 | 33 |
| Northern Cloudywing | 15 | 1 | 0 | 1 | 1 | 0 | 3 | 4 | 0 | 4 | 0 | 1 |
| Northern Pearly Eye | 81 | 0 | 0 | 5 | 12 | 19 | 7 | 6 | 9 | 0 | 12 | 11 |
| Painted Lady | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 1 | 0 | 0 |
| Pearl Crescent | 106 | 31 | 28 | 2 | 2 | 3 | 6 | 7 | 11 | 12 | 1 | 3 |
| Peck's Skipper | 31 | 0 | 4 | 3 | 3 | 4 | 1 | 2 | 6 | 3 | 3 | 2 |
| Question Mark | 58 | 0 | 2 | 0 | 2 | 3 | 3 | 28 | 3 | 11 | 5 | 1 |
| Red Admiral | 154 | 2 | 3 | 2 | 8 | 1 | 6 | 111 | 3 | 5 | 7 | 6 |
| Red-spotted Purple | 8 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 |
| Roadside Skipper | 4 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
| Silver-bordered Fritillary | 40 | 2 | 11 | 0 | 6 | 2 | 9 | 5 | 1 | 4 | 0 | 0 |
| Silver-spotted Skipper | 451 | 6 | 11 | 56 | 19 | 31 | 64 | 18 | 106 | 110 | 12 | 18 |
| Silvery Checkerspot | 144 | 2 | 6 | 12 | 8 | 21 | 16 | 0 | 39 | 27 | 4 | 9 |
| Southern Cloudywing | 46 | 8 | 2 | 1 | 0 | 0 | 1 | 8 | 10 | 12 | 1 | 3 |
| Spicebush Swallowtail | 11 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 6 | 0 | 1 |
| Striped Hairstreak | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| Summer Azure | 145 | 1 | 4 | 1 | 12 | 33 | 21 | 18 | 6 | 33 | 7 | 9 |
| Tawny Edged Skipper | 33 | 1 | 2 | 2 | 3 | 5 | 2 | 2 | 2 | 5 | 5 | 4 |
| Tawny Emperor | 20 | 0 | 0 | 0 | 2 | 12 | 2 | 0 | 2 | 0 | 2 | 0 |
| Tiger Swallowtail | 42 | 4 | 5 | 2 | 1 | 0 | 4 | 0 | 5 | 19 | 0 | 2 |
| Viceroy | 57 | 3 | 5 | 4 | 6 | 0 | 4 | 2 | 8 | 14 | 3 | 8 |
| Wild Indigo Duskywing | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Wood Nymph | 233 | 0 | 0 | 45 | 59 | 19 | 9 | 3 | 4 | 0 | 21 | 73 |