
| 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 | 9 | 41 | 42 | 41 | 9 | 6 | . | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 10 | 10 | 15 | 26 | 6 | 3 | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | . | . | . | . | 18 | 22 | 13 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | . | . | . | . | . | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 2 | . | 1 | 1 | 1 | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 3 | ||||
| Large White | . | . | 1 | 1 | 6 | 5 | 5 | 8 | 6 | 4 | 5 | 1 | 5 | 3 | 11 | 7 | 26 | 10 | 9 | 4 | 3 | . | ||||
| Small White | . | . | . | . | . | 5 | 2 | 11 | 7 | 7 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 9 | 11 | 8 | . | . | ||||
| Green-veined White | . | . | . | 3 | 8 | 5 | 9 | . | . | . | . | . | . | . | . | 2 | 7 | 6 | 1 | 1 | . | . | ||||
| Orange Tip | . | . | . | . | . | 2 | 3 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | . | . | 2 | 1 | . | 4 | 7 | 3 | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | 1 | 2 | 11 | 8 | 2 | 3 | ||||
| Small Blue | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brown Argus | . | . | . | . | . | . | . | 3 | 2 | 2 | . | 2 | 4 | . | . | . | . | 2 | 3 | 3 | 1 | 2 | ||||
| Common Blue | . | . | . | . | . | 1 | 4 | . | 1 | 12 | 24 | 18 | 12 | 1 | . | . | . | 1 | 8 | 13 | 9 | 4 | ||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 36 | 91 | 100 | 96 | 53 | 28 | 10 | 4 | ||||
| Small Tortoiseshell | 3 | 1 | 3 | 4 | 1 | 2 | 3 | 1 | . | . | . | 3 | 9 | . | 13 | 8 | 3 | 3 | 1 | 9 | 32 | 27 | ||||
| Peacock | . | 3 | 2 | 4 | 4 | 5 | 6 | 1 | . | . | 1 | . | . | . | 1 | 1 | 9 | 9 | 1 | 1 | 1 | 1 | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||
| Marsh Fritillary | . | . | . | . | . | . | . | 2 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 2 | ||||
| Wall Brown | . | . | . | . | . | . | 4 | 7 | 4 | . | . | . | . | . | . | . | . | 4 | 9 | 9 | . | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 21 | 50 | 95 | 72 | 50 | 25 | 1 | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 8 | 1 | 2 | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 1 | 52 | 159 | 110 | 231 | 267 | 300 | 189 | 278 | 211 | 146 | 75 | 47 | ||||
| Small Heath | . | . | . | . | . | . | 5 | 22 | 36 | 35 | 46 | 43 | 46 | 20 | 6 | 4 | 1 | . | 4 | 9 | 5 | 1 | ||||