
| 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 | . | . | . | . | . | . | . | 4 | . | . | . | . | 18 | 8 | . | . | . | |||||||||
| Large Skipper | . | . | . | . | . | . | 2 | . | 10 | . | . | 8 | . | . | . | . | . | |||||||||
| Grizzled Skipper | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 6 | |||||||||
| Brimstone | 8 | . | 12 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||||||||
| Large White | . | . | . | . | . | 10 | . | . | 6 | . | 2 | . | 64 | 2 | 34 | 2 | 2 | |||||||||
| Small White | 2 | . | 2 | 12 | 6 | 22 | . | 10 | . | . | . | 12 | 6 | . | . | . | 4 | |||||||||
| Green-veined White | . | . | 16 | 62 | 86 | 32 | 12 | . | . | . | . | . | 10 | 230 | 18 | 28 | 2 | |||||||||
| Orange Tip | 2 | 14 | 30 | 42 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | 2 | 2 | 4 | 2 | . | . | . | . | . | . | . | 2 | 6 | . | |||||||||
| Common Blue | . | . | . | . | 4 | 4 | 20 | 2 | 2 | . | . | . | . | 8 | 28 | 46 | 8 | |||||||||
| Holly Blue | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | |||||||||
| Painted Lady | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | 2 | . | |||||||||
| Small Tortoiseshell | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 2 | |||||||||
| Peacock | 4 | 2 | 2 | 2 | 2 | . | . | . | . | . | . | . | . | 4 | 4 | . | 4 | |||||||||
| Comma | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | . | . | 8 | 8 | 2 | . | 4 | . | 4 | . | . | 2 | . | 2 | 4 | 6 | 14 | |||||||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 10 | 32 | 68 | 2 | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 6 | 90 | 84 | 108 | 4 | 6 | . | |||||||||
| Meadow Brown | . | . | . | . | . | . | 52 | 78 | 458 | 106 | 106 | 230 | 868 | 224 | 48 | 52 | 8 | |||||||||
| Ringlet | . | . | . | . | . | . | . | . | 12 | . | 2 | 6 | 6 | . | . | . | . | |||||||||