
| 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 | ||||||||||||||||||||||||||
| Small/Essex Skipper | . | . | . | . | . | . | . | 5 | 9 | 48 | 34 | 5 | 1 | 2 | . | . | . | . | ||||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | 15 | 76 | 136 | 315 | 110 | 77 | 3 | ||||||||
| Large Skipper | . | . | . | . | . | . | 1 | 6 | 9 | 7 | 7 | 1 | 2 | 2 | . | . | . | . | ||||||||
| Dingy Skipper | . | 12 | 26 | 13 | 1 | 3 | . | . | . | . | . | . | 1 | . | 1 | . | . | . | ||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Brimstone | 1 | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | ||||||||
| Large White | . | . | 2 | 2 | 2 | . | . | . | . | 1 | 3 | 14 | 10 | 8 | 4 | 7 | 1 | . | ||||||||
| Small White | . | 2 | 2 | . | 1 | . | . | . | 1 | 1 | 5 | 2 | 6 | 3 | 2 | 6 | 1 | . | ||||||||
| Green-veined White | . | 2 | . | . | . | 1 | . | . | . | . | . | 1 | 3 | 2 | 1 | 1 | 1 | . | ||||||||
| Green Hairstreak | . | 5 | 3 | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | 1 | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | ||||||||
| Small Blue | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | 3 | 1 | 2 | . | . | . | ||||||||
| Brown Argus | . | . | 1 | 17 | 14 | 24 | 17 | . | 1 | . | . | 8 | 10 | 15 | 23 | 15 | 17 | 2 | ||||||||
| Common Blue | . | . | 9 | 42 | 39 | 34 | 51 | 12 | 7 | . | 2 | 10 | 30 | 54 | 70 | 39 | 76 | 16 | ||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | 64 | 400 | 585 | 637 | 468 | 157 | 36 | . | ||||||||
| Adonis Blue | . | . | 1 | 2 | 15 | 18 | 31 | . | . | . | . | . | . | . | 2 | 22 | 36 | 5 | ||||||||
| Holly Blue | . | . | 1 | 1 | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Red Admiral | . | . | . | 1 | . | 1 | . | 2 | . | . | . | . | . | . | . | 2 | 1 | 1 | ||||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | 1 | 2 | 2 | 2 | 1 | . | 1 | . | . | . | . | ||||||||
| Peacock | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | ||||||||
| Comma | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | ||||||||
| Speckled Wood | 1 | 1 | . | . | 1 | . | 1 | . | 1 | . | . | 1 | . | . | . | 4 | 4 | . | ||||||||
| Marbled White | . | . | . | . | . | . | . | 10 | 58 | 155 | 170 | 16 | 3 | 6 | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 6 | 34 | 69 | 46 | 39 | 15 | 2 | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | 3 | 74 | 154 | 221 | 349 | 429 | 417 | 328 | 424 | 277 | 212 | 61 | ||||||||
| Small Heath | . | . | 2 | 1 | 3 | 8 | 23 | 27 | 23 | 22 | 8 | 2 | . | . | 9 | 7 | 23 | 7 | ||||||||
| Ringlet | . | . | . | . | . | . | . | 2 | 5 | 10 | 3 | . | . | . | . | . | . | . | ||||||||