
| 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 | . | . | . | . | . | . | . | . | . | 7 | 5 | 29 | 3 | 1 | 1 | . | . | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | 1 | 3 | . | 2 | 2 | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | 2 | 10 | 12 | 12 | 2 | 9 | . | . | . | . | . | . | . | ||||||||
| Dingy Skipper | . | . | . | 4 | 4 | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 8 | 1 | . | 1 | . | ||||||||
| Brimstone | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Large White | . | . | . | . | . | . | . | . | . | . | 1 | 17 | 14 | 2 | . | . | . | . | ||||||||
| Small White | . | 1 | 1 | . | 1 | . | . | . | . | . | 1 | 17 | 24 | 15 | 11 | 10 | 10 | . | ||||||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 1 | 2 | . | ||||||||
| Small Copper | . | . | . | 4 | 2 | . | 1 | 1 | . | . | . | 2 | 3 | 5 | 3 | 1 | 2 | 1 | ||||||||
| Brown Argus | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 4 | 2 | 5 | . | 2 | . | ||||||||
| Common Blue | . | . | . | . | 1 | 26 | 43 | 15 | 13 | . | . | 46 | 96 | 63 | 46 | 15 | 13 | 1 | ||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | 2 | 387 | 167 | 81 | 25 | 9 | 5 | . | ||||||||
| Adonis Blue | . | . | . | . | . | 4 | 4 | 4 | . | . | . | . | . | 6 | 11 | 2 | 3 | . | ||||||||
| Red Admiral | . | . | . | . | . | 1 | . | . | 3 | . | . | 1 | 2 | . | 1 | . | 4 | 2 | ||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 3 | 3 | . | 2 | . | ||||||||
| Small Tortoiseshell | . | 1 | . | 2 | . | . | . | . | 5 | 1 | . | 3 | 8 | 10 | 10 | . | 29 | 7 | ||||||||
| Peacock | 2 | 3 | 2 | 3 | . | . | . | . | . | . | . | 4 | 2 | 1 | . | . | . | . | ||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Wall Brown | . | . | . | . | 2 | . | . | . | . | . | . | 9 | 5 | 5 | . | . | . | . | ||||||||
| Marbled White | . | . | . | . | . | . | . | . | 7 | 64 | 67 | 7 | . | . | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 6 | 9 | 14 | 14 | 2 | . | . | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 7 | 30 | 36 | 316 | 194 | 110 | 67 | 36 | 9 | 3 | ||||||||
| Small Heath | . | . | . | . | 2 | 6 | 1 | 1 | 7 | 7 | 6 | 2 | 13 | 6 | 10 | 1 | 11 | . | ||||||||