
| 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 | NI | . | . | . | . | . | . | . | . | . | . | . | 5 | 15 | 51 | 29 | 26 | 17 | 2 | 1 | . | . | |||||
| Silver-spotted Skipper | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | |||||
| Large Skipper | 8 | . | . | . | . | . | . | . | . | . | . | 4 | 4 | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 43 | . | . | 2 | 5 | 13 | 14 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 40 | . | . | . | 8 | 10 | 11 | 4 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 65 | 1 | . | 7 | 4 | 4 | 2 | 2 | 1 | 2 | 1 | . | . | . | 1 | 13 | 8 | 11 | 3 | 2 | . | . | |||||
| Large White | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | 1 | . | . | . | |||||
| Small White | 29 | . | . | . | . | 3 | . | . | 2 | 4 | . | . | . | . | 1 | 2 | 1 | 4 | 4 | 2 | 2 | 2 | |||||
| Green Hairstreak | 4 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 21 | . | . | . | . | 1 | 7 | . | . | . | . | . | . | . | 3 | 1 | 2 | 2 | 1 | . | . | 1 | |||||
| Small Blue | 9 | . | . | . | . | . | 2 | . | 2 | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | 11 | . | . | . | . | . | 2 | 3 | . | 1 | . | . | . | . | . | . | . | . | 1 | . | 2 | . | |||||
| Common Blue | 146 | . | . | . | . | . | 2 | 2 | 7 | 10 | 17 | 5 | 2 | 1 | . | . | . | . | 11 | 33 | 30 | 14 | |||||
| Chalk-hill Blue | 168 | . | . | . | . | . | . | . | . | . | . | . | . | . | 13 | 28 | 32 | 50 | 30 | 12 | 3 | . | |||||
| Adonis Blue | 51 | . | . | . | . | . | . | 10 | 2 | 2 | . | . | . | . | . | . | . | . | 1 | 10 | 14 | 4 | |||||
| Holly Blue | 2 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Duke of Burgundy Fritillary | 5 | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 43 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 1 | . | . | 1 | 13 | 12 | 9 | |||||
| Peacock | 12 | . | 2 | . | 1 | . | . | . | 1 | . | . | . | . | . | . | 3 | 2 | . | . | . | 1 | . | |||||
| Dark Green Fritillary | 70 | . | . | . | . | . | . | . | . | . | . | 1 | 6 | 17 | 16 | 14 | 6 | 10 | . | . | . | . | |||||
| Marsh Fritillary | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 3 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||
| Wall Brown | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | |||||
| Marbled White | 169 | . | . | . | . | . | . | . | . | . | . | 20 | 79 | 35 | 30 | 4 | 1 | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 98 | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | 31 | 36 | 14 | 9 | . | . | . | . | |||||
| Meadow Brown | 2699 | . | . | . | . | . | . | . | . | 2 | 6 | 28 | 32 | 56 | 191 | 313 | 332 | 479 | 499 | 404 | 222 | 90 | |||||
| Small Heath | 328 | . | . | . | . | . | . | 1 | 4 | 16 | 45 | 46 | 42 | 70 | 42 | 22 | 25 | 9 | 1 | 1 | 1 | . | |||||
| Ringlet | 27 | . | . | . | . | . | . | . | . | . | . | . | 6 | 14 | 7 | . | . | . | . | . | . | . | |||||