
| 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 | ||||||||||||||||||||||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | 12 | 9 | 12 | 5 | 2 | . | . | . | . | . | . | . | . | . | ||
| Dingy Skipper | . | . | . | . | . | . | 1 | 1 | 3 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||
| Brimstone | 7 | . | 7 | 4 | 8 | . | 1 | 1 | 7 | . | . | 1 | . | 1 | . | 2 | 1 | . | . | 1 | . | 2 | . | . | ||
| Large White | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 2 | 3 | 1 | 1 | 3 | 4 | 1 | 2 | 3 | . | ||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 3 | 3 | 1 | 2 | 5 | 1 | 1 | 1 | 2 | 1 | ||
| Green-veined White | . | . | . | . | . | . | . | 2 | . | . | . | . | . | 1 | . | . | . | 1 | . | 1 | . | . | . | . | ||
| Orange Tip | . | . | . | 4 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Green Hairstreak | . | . | . | . | . | 1 | . | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||
| Northern Brown Argus | . | . | . | . | . | . | . | . | 1 | 1 | 5 | 12 | 9 | 5 | 4 | 2 | . | . | . | . | . | . | . | . | ||
| Common Blue | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 3 | 1 | 3 | 3 | . | . | . | . | ||
| Red Admiral | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | 2 | 1 | 4 | 1 | . | 1 | 1 | 3 | 2 | . | . | ||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 3 | . | . | ||
| Small Tortoiseshell | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | 4 | 1 | . | . | . | . | . | . | 1 | . | . | ||
| Peacock | 6 | 12 | 14 | 9 | 2 | 1 | . | 1 | . | . | . | . | . | . | . | 2 | 7 | 3 | 2 | . | . | . | . | . | ||
| Comma | . | 4 | 1 | 2 | . | . | . | . | . | . | . | . | . | 2 | . | 1 | 1 | . | . | . | 1 | . | . | 1 | ||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | . | 2 | 6 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||
| Pearl-bordered Fritillary | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | . | 1 | 6 | 24 | 25 | 13 | 9 | 2 | 3 | . | . | . | . | . | . | ||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 12 | 6 | 8 | 1 | . | . | . | . | . | . | . | ||
| Speckled Wood | . | . | . | 6 | 20 | 22 | 10 | 15 | 13 | 36 | 56 | 42 | 34 | 16 | 7 | 22 | 24 | 26 | 21 | 22 | 104 | 88 | 89 | 90 | ||
| Wall Brown | . | . | . | . | . | . | . | . | 4 | . | . | . | . | 1 | . | . | . | 2 | 1 | 6 | 1 | . | . | . | ||
| Grayling | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 5 | 1 | 2 | 3 | 1 | 1 | . | . | . | . | . | . | ||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | ||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | 2 | 19 | 53 | 65 | 68 | 32 | 13 | 3 | 4 | . | . | . | . | . | ||