
| 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 | 2 | 3 | 1 | . | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | 2 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | 2 | 3 | 1 | 6 | 8 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 3 | 4 | 6 | . | . | . | 1 | ||||||
| Brimstone | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | ||||||
| Large White | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | . | 1 | . | . | ||||||
| Small White | . | . | 1 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Green-veined White | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 26 | 4 | 5 | 2 | 2 | . | ||||||
| Small Copper | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | 3 | 2 | . | . | 2 | . | ||||||
| Brown Argus | . | . | . | 3 | . | 10 | 17 | 9 | . | . | . | . | . | 1 | 4 | 33 | 37 | 3 | 12 | 4 | ||||||
| Common Blue | . | . | . | 1 | . | 2 | 15 | 15 | . | . | . | . | 1 | 2 | 50 | 69 | 35 | 17 | 6 | 3 | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 12 | 97 | 86 | 40 | 13 | 18 | 5 | ||||||
| Adonis Blue | . | . | . | . | . | 2 | 13 | 7 | 1 | . | . | . | . | . | . | 8 | 41 | 21 | 4 | 2 | ||||||
| Holly Blue | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | 1 | . | . | . | 2 | 1 | . | 1 | . | . | . | 1 | 3 | 20 | 4 | 2 | . | . | 2 | ||||||
| Painted Lady | . | . | . | . | 3 | 3 | 14 | 14 | 1 | 2 | 1 | . | 6 | 40 | 63 | 29 | 2 | 1 | . | . | ||||||
| Small Tortoiseshell | . | . | . | . | . | 1 | . | . | . | . | . | 3 | . | 1 | . | 1 | 1 | . | . | . | ||||||
| Peacock | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | 3 | 2 | . | 1 | . | . | . | ||||||
| Comma | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 4 | 18 | 27 | 14 | 6 | 1 | . | . | . | . | ||||||
| Glanville Fritillary | . | . | . | . | . | 2 | 8 | 6 | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Speckled Wood | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | ||||||
| Wall Brown | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | 2 | 2 | 3 | . | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 25 | 41 | 86 | 72 | 6 | 1 | . | . | . | . | ||||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 2 | 14 | 69 | 54 | 18 | 5 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 9 | 4 | 34 | 87 | 106 | 64 | 105 | 45 | 20 | 16 | 10 | . | ||||||
| Small Heath | . | . | . | . | 1 | 6 | 22 | 21 | 32 | 32 | 38 | 22 | 9 | . | 1 | 12 | 9 | 18 | 23 | 4 | ||||||