
| APR | MAY | JUN | JUL | AUG | SEP | ||||||||||||||||||||||
| Week no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | |
| Site | Ind | ||||||||||||||||||||||||||
| Small Skipper | 89 | . | . | . | . | . | . | . | . | . | . | 16 | 27 | 28 | . | 9 | 5 | 4 | . | . | . | . | . | ||||
| Large Skipper | 99 | . | . | . | . | . | . | . | . | 32 | 29 | 5 | 17 | 14 | 1 | 1 | . | . | . | . | . | . | . | ||||
| Dingy Skipper | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | 2 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 106 | 6.5 | 10 | 13 | 4 | . | 8 | 4 | 5 | . | . | . | 2 | 9 | 2 | 17 | 14 | 1 | . | . | 1 | 2 | . | ||||
| Large White | 72 | . | . | . | . | . | . | 2 | . | . | . | . | 14 | 4 | . | 16 | 1 | 31 | 2 | 2 | . | . | . | ||||
| Small White | 175 | . | 3 | . | 7 | . | 3 | 1 | 2 | . | . | . | 6 | 25 | 11 | 35 | 27 | 7 | 13 | 13 | 20 | 4 | . | ||||
| Green-veined White | 14 | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | 6 | 1 | 1 | . | . | . | . | . | ||||
| Orange Tip | 15 | 3 | 4 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | 6 | . | . | . | . | . | 1 | . | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | . | 1 | ||||
| Common Blue | 6 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 3 | 2 | . | . | . | . | . | ||||
| Holly Blue | 2 | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | 7 | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | . | . | . | . | . | . | . | . | . | ||||
| Purple Emperor | 2 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | 6 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | 1 | . | . | 2 | . | . | . | . | . | ||||
| Small Tortoiseshell | 27 | 4.5 | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | 4 | 5 | 1 | 1 | 3 | . | 1 | . | ||||
| Peacock | 129 | 9.5 | 25 | 7 | 7 | . | 1 | . | . | . | . | . | 5 | 10 | 5 | 33 | 10 | 5 | . | . | 1 | 1 | . | ||||
| Comma | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 1 | ||||
| Small Pearl-bordered Fritillary | 14 | . | . | . | . | . | 10 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Pearl-bordered Fritillary | 26 | . | 3 | 8 | 10 | . | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | 37 | . | . | . | . | . | . | . | . | 1 | 4 | 9 | 10 | 6 | 2 | 5 | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | 226 | . | . | . | . | . | . | . | . | 10 | 94 | 36 | 30 | 20 | 3 | 13 | 16 | 3 | 1 | . | . | . | . | ||||
| Speckled Wood | 159 | 1 | 6 | 3 | 3 | . | 16 | 11 | 2 | 29 | . | . | 3 | 6 | 7 | 8 | 9 | 25 | 16 | 3 | 5 | 3 | 2 | ||||
| Marbled White | 124 | . | . | . | . | . | . | . | . | . | 23 | 62 | 23 | 16 | 1 | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 622 | . | . | . | . | . | . | . | . | . | . | 1 | 67 | 163 | 98 | 150 | 114 | 27 | 3 | . | . | . | . | ||||
| Meadow Brown | 177 | . | . | . | . | . | . | . | . | 5 | 18 | 26 | 55 | 3 | 16 | 29 | 6 | 19 | . | . | . | . | . | ||||
| Ringlet | 708 | . | . | . | . | . | . | . | . | 6 | 136 | 294 | 114 | 130 | 23 | 4 | 1 | . | . | . | . | . | . | ||||