
| 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 | . | . | . | . | . | . | . | . | . | 4 | 12 | 18 | 12 | 12 | 6 | 1 | 1 | . | 1 | . | . | |||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 2 | 2 | 3 | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 8 | 5 | 6 | . | 1 | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | . | . | 3 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 4 | 3 | 3 | 1 | . | . | . | . | . | . | . | . | 1 | 1 | 3 | 2 | 6 | . | . | . | . | |||||
| Large White | . | . | . | . | . | . | 1 | 7 | 1 | . | . | . | . | 1 | 8 | 12 | 5 | . | . | . | . | |||||
| Small White | . | . | . | . | . | . | . | 2 | 2 | . | . | 1 | 1 | 11 | 15 | 29 | 6 | 1 | 1 | . | . | |||||
| Green-veined White | . | . | . | 2 | 1 | . | 9 | 2 | . | . | . | 2 | 2 | 1 | 2 | 17 | 13 | 1 | . | . | . | |||||
| Small Copper | . | . | . | . | 2 | . | . | . | . | . | . | . | . | 4 | 4 | 6 | 7 | 6 | 4 | . | 1 | |||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | 2 | 4 | 2 | . | |||||
| Common Blue | . | . | . | . | . | . | 1 | 4 | 5 | 2 | . | . | . | . | 6 | 7 | 57 | 63 | 49 | 7 | 3 | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 4 | 3 | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 1 | . | 2 | 4 | . | 6 | |||||
| Peacock | 6 | 6 | 2 | 2 | . | . | . | . | . | . | . | . | . | 3 | 1 | 7 | 4 | . | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | . | . | . | 1 | . | . | 1 | 2 | . | 2 | 1 | 1 | . | . | 1 | 6 | 6 | 4 | 5 | 1 | 5 | |||||
| Wall Brown | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 2 | 2 | 1 | 2 | . | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | 8 | 13 | 17 | 7 | 8 | 2 | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 18 | 26 | 26 | 23 | 1 | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | . | 40 | 224 | 191 | 256 | 171 | 204 | 132 | 104 | 126 | 92 | 65 | 3 | 4 | |||||
| Small Heath | . | . | . | . | . | . | 7 | 14 | 12 | 46 | 28 | 24 | 12 | 8 | 8 | 5 | 17 | 22 | 10 | 3 | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | |||||
| Unknown White | . | . | . | 2 | . | . | . | . | . | . | . | . | 2 | . | . | 2 | 1 | . | . | . | . | |||||