
| 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 | . | . | 3 | 1 | 48 | 28 | 3 | 4 | . | . | . | . | . | ||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 5 | 1 | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | 1 | 4 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | . | 12 | 4 | 9 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | . | 2 | 14 | 9 | 8 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | 2 | . | ||||
| Brimstone | 4 | 2 | 4 | 1 | 6 | 2 | 2 | 6 | 2 | 1 | . | 1 | . | 2 | 3 | 4 | 3 | . | 2 | . | 1 | . | ||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 13 | 1 | . | 1 | . | 2 | . | ||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | 16 | 20 | 15 | 26 | 9 | 27 | 22 | 27 | 2 | ||||
| Green-veined White | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | 3 | 1 | 1 | 2 | . | 1 | . | . | 1 | ||||
| Orange Tip | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | . | . | 3 | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 6 | 2 | 1 | 2 | 3 | 1 | 2 | ||||
| Brown Argus | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 2 | 3 | 2 | 5 | 1 | . | ||||
| Common Blue | . | . | . | . | . | 1 | 5 | 8 | 4 | 8 | 1 | . | . | 1 | 17 | 52 | 28 | 36 | 42 | 12 | 10 | 3 | ||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 210 | 294 | 431 | 325 | 251 | 114 | 48 | 16 | 5 | ||||
| Adonis Blue | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | 5 | 11 | 8 | . | ||||
| Duke of Burgundy Fritillary | . | . | . | . | 3 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 4 | 2 | 1 | 1 | 2 | 1 | . | . | 2 | ||||
| Painted Lady | . | . | . | . | . | . | 2 | . | 2 | . | 1 | 4 | 1 | 3 | . | 3 | . | . | 1 | . | 1 | . | ||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 1 | . | 4 | 1 | . | 2 | 2 | 4 | 17 | 12 | 3 | . | ||||
| Peacock | 2 | 2 | 1 | . | 2 | . | . | . | . | . | . | . | . | 4 | 6 | 10 | 1 | 1 | . | 1 | . | . | ||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | 1 | 1 | 1 | . | 1 | . | 2 | 4 | 6 | 7 | 3 | 1 | . | 8 | 11 | 8 | 4 | 6 | 11 | 15 | 5 | 4 | ||||
| Wall Brown | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 1 | 6 | 4 | 1 | 1 | . | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 3 | 36 | 26 | 33 | 8 | . | . | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 18 | 23 | 30 | 3 | 7 | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | 5 | 17 | 25 | 28 | 17 | 109 | 110 | 170 | 110 | 84 | 28 | 41 | 8 | 5 | ||||
| Small Heath | . | . | . | . | . | 1 | 8 | 11 | 10 | 18 | 29 | 25 | 11 | 19 | 18 | 1 | 5 | 8 | 3 | 14 | 3 | 4 | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 5 | 10 | 5 | 4 | 2 | . | . | . | . | . | . | . | ||||