
| 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 Skipper | . | . | . | . | . | . | . | . | . | . | 51 | 53 | 19 | 24 | 5 | . | . | . | . | . | ||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | 11 | 1 | . | . | . | . | . | . | . | . | . | ||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 52 | 349 | 118 | 61 | 51 | 27 | 5 | ||||||
| Large Skipper | . | . | . | . | . | . | . | 4 | 7 | 15 | 18 | 5 | 5 | 3 | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | 3 | 32 | 48 | 23 | 21 | . | 1 | . | . | . | 3 | . | 5 | 1 | . | . | . | . | . | ||||||
| Brimstone | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Large White | . | . | 1 | . | 1 | 1 | . | 1 | . | . | 3 | 3 | 9 | 4 | . | 4 | 14 | 1 | 4 | 2 | ||||||
| Small White | . | 1 | . | . | . | . | . | . | . | . | 1 | 2 | 2 | 3 | 1 | 10 | 17 | 4 | 6 | 7 | ||||||
| Green-veined White | . | 1 | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | ||||||
| Orange Tip | . | . | 2 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | 2 | 4 | 1 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | 4 | 2 | 1 | 1 | 4 | 7 | 7 | ||||||
| Brown Argus | . | . | . | . | 7 | 15 | 4 | 2 | 1 | . | . | 1 | 8 | 22 | 30 | 58 | 54 | 31 | 22 | 18 | ||||||
| Common Blue | . | . | . | 1 | 16 | 32 | 11 | 7 | 7 | 4 | . | 12 | 31 | 30 | 74 | 115 | 114 | 126 | 62 | 15 | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | 23 | 226 | 524 | 619 | 382 | 196 | 82 | 38 | 17 | 5 | ||||||
| Adonis Blue | . | . | . | . | 4 | 13 | 10 | 4 | . | . | . | . | . | . | 3 | 19 | 28 | 37 | 36 | 10 | ||||||
| Holly Blue | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | 2 | 2 | 1 | 2 | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | 2 | . | ||||||
| Small Tortoiseshell | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 2 | 4 | 2 | ||||||
| Peacock | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 3 | . | . | . | . | ||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Speckled Wood | . | 2 | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | 2 | 1 | ||||||
| Wall Brown | . | . | 1 | 1 | . | 3 | . | . | . | . | . | . | . | 4 | 5 | . | 2 | . | . | 1 | ||||||
| Marbled White | . | . | . | . | . | . | . | 2 | 56 | 194 | 313 | 135 | 13 | 26 | . | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 13 | 141 | 95 | 111 | 71 | 32 | 6 | 4 | 1 | . | ||||||
| Meadow Brown | . | . | . | . | . | . | 1 | 14 | 50 | 219 | 297 | 456 | 506 | 770 | 749 | 637 | 340 | 282 | 175 | 64 | ||||||
| Small Heath | . | . | . | 2 | 12 | 15 | 20 | 12 | 25 | 15 | 24 | 6 | 1 | . | 1 | 1 | 4 | 5 | 12 | 5 | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 1 | 6 | 15 | 2 | . | . | . | . | . | . | . | . | ||||||