
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 20 | 20 | 11 | 1 | 4 | 1 | . | . | . | . | |||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 9 | 37 | 31 | 7 | 3 | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | 1 | . | 4 | . | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | . | 1 | 2 | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | 1 | . | . | 11 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | . | . | 3 | 2 | 3 | 3 | 3 | . | . | 2 | 1 | 1 | . | . | . | . | . | 1 | . | . | . | . | 1 | |||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 2 | . | 2 | . | . | 1 | |||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | |||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 3 | . | . | . | |||
| Green Hairstreak | . | . | . | 1 | . | 2 | 1 | 2 | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 3 | 2 | . | 1 | . | . | . | . | 1 | 10 | |||
| Small Blue | . | . | . | . | . | . | 3 | 3 | 6 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | |||
| Brown Argus | . | . | . | . | . | . | 1 | 3 | . | 1 | . | . | . | . | . | . | 1 | 3 | 2 | 6 | . | . | . | |||
| Common Blue | . | . | . | . | . | . | 21 | 9 | 6 | 4 | 1 | 5 | . | . | 1 | 1 | 3 | 5 | 16 | 9 | 2 | 1 | 5 | |||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 5 | 1 | 5 | . | . | . | |||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | 1 | . | . | . | 1 | |||
| Small Tortoiseshell | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||
| Peacock | . | 2 | 2 | 2 | . | 1 | 1 | . | . | . | . | . | . | . | 1 | . | 3 | 1 | 1 | . | . | . | . | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 16 | 34 | 13 | 33 | 7 | 9 | . | 2 | 2 | . | . | . | . | |||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 10 | 13 | 18 | 25 | 15 | 6 | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 1 | 1 | . | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 1 | 1 | 5 | 11 | 33 | 29 | 256 | 290 | 259 | 396 | 216 | 79 | 51 | 21 | |||
| Small Heath | . | . | . | . | . | . | . | 3 | 3 | 4 | 19 | 30 | 17 | 15 | 6 | 5 | 2 | 2 | 5 | 7 | 3 | 3 | 1 | |||
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | 1 | . | . | . | . | . | . | . | . | |||