
| 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 | ||||||||||||||||||||||||||
| Large Skipper | 65 | . | . | . | . | . | . | . | 1 | 1 | 14 | 8 | 12 | 12 | 7 | 7 | 2 | . | 1 | . | . | . | . | . | . | ||
| Dingy Skipper | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||
| Brimstone | 36 | 3 | 2 | 3 | 1 | 3 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | 4 | 8 | 4 | 2 | . | 2 | ||
| Large White | 8 | . | . | . | . | 2 | . | 2 | 1 | 1 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Green-veined White | 32 | . | . | . | . | 5 | 1 | 6 | 2 | 1 | 1 | . | 1 | . | . | . | 2 | 1 | 5 | 2 | 1 | 2 | . | 1 | . | ||
| Orange Tip | 31 | . | . | 4 | 16 | 9 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Purple Hairstreak | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | ||
| Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | ||
| Northern Brown Argus | 6 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | . | ||
| Common Blue | 7 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 2 | 3 | 1 | . | . | . | . | . | . | . | ||
| Holly Blue | NI | 1 | . | 2 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Duke of Burgundy Fritillary | 2 | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Red Admiral | 3 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | ||
| Small Tortoiseshell | 2 | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||
| Peacock | 62 | 15 | 13 | 12 | 8 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | 1 | . | 3 | 3 | . | 1 | . | . | ||
| Small Pearl-bordered Fritillary | 53 | . | . | . | . | . | . | . | . | 17 | . | 10 | 16 | 4 | . | 6 | . | . | . | . | . | . | . | . | . | ||
| Pearl-bordered Fritillary | 162 | . | . | . | . | 7 | 30 | 23 | 45 | 25 | 24 | 7 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||
| High Brown Fritillary | 127 | . | . | . | . | . | . | . | . | . | . | . | 2 | 25 | 31 | 39 | 12 | 10 | 1 | 6 | 1 | . | . | . | . | ||
| Wall Brown | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | ||
| Meadow Brown | 161 | . | . | . | . | . | . | . | . | . | . | 3 | 13 | 35 | 28 | 17 | 28 | 18 | 7 | 6 | 6 | . | . | . | . | ||