
| 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 | . | . | . | . | . | 2 | 16 | 44 | 46 | 57 | 4 | 14 | . | 3 | 5 | . | . | . | . | |||||||
| Large Skipper | . | . | . | . | . | 5 | 7 | 7 | 5 | 4 | . | 1 | . | . | 1 | . | . | . | . | |||||||
| Dingy Skipper | . | . | 4 | 10 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | . | . | 1 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | 7 | . | 2 | 1 | 2 | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | |||||||
| Large White | . | . | . | . | 2 | . | . | . | . | . | . | . | 2 | . | . | 3 | . | 1 | . | |||||||
| Small White | . | . | . | . | 1 | . | . | . | . | . | . | 3 | 4 | 10 | 4 | . | . | 1 | . | |||||||
| Green-veined White | . | 2 | 1 | 2 | 2 | . | . | . | . | . | . | . | . | 1 | 3 | . | . | . | . | |||||||
| Orange Tip | . | 6 | 6 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | . | . | 4 | 8 | 6 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | |||||||
| Small Blue | . | . | . | . | . | 10 | 8 | 2 | 2 | . | . | . | . | . | 2 | . | . | . | . | |||||||
| Brown Argus | . | . | . | 7 | 4 | 1 | 1 | . | . | . | . | 1 | . | 6 | 3 | 6 | 1 | 1 | . | |||||||
| Common Blue | . | . | . | 12 | 50 | 40 | 21 | 4 | . | . | . | 2 | 7 | 33 | 63 | 15 | 7 | 1 | . | |||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | 4 | 17 | 59 | 17 | 175 | 39 | 95 | 26 | 32 | . | . | . | |||||||
| Holly Blue | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Duke of Burgundy Fritillary | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Tortoiseshell | 1 | 1 | . | . | . | 4 | 22 | 5 | . | 1 | . | 1 | 1 | 3 | 13 | 1 | 3 | 1 | 1 | |||||||
| Peacock | 5 | 2 | 3 | 2 | 1 | . | . | . | . | . | . | 2 | 4 | 4 | 3 | . | . | . | 1 | |||||||
| Dark Green Fritillary | . | . | . | . | . | 1 | 6 | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | . | 1 | 1 | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 8 | 12 | . | . | . | |||||||
| Marbled White | . | . | . | . | . | 4 | 198 | 487 | 341 | 197 | 18 | 37 | 5 | . | 1 | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 23 | 64 | 36 | 52 | 25 | 43 | 16 | 9 | 1 | . | . | |||||||
| Meadow Brown | . | . | . | . | . | 21 | 104 | 105 | 104 | 158 | 58 | 89 | 42 | 40 | 17 | 17 | . | . | . | |||||||
| Small Heath | . | . | . | 17 | 20 | 11 | 14 | 17 | 9 | 3 | . | . | . | 14 | 43 | 32 | 2 | 2 | . | |||||||
| Ringlet | . | . | . | . | . | 1 | 16 | 31 | 36 | 17 | 2 | 4 | 1 | . | . | . | . | . | . | |||||||