
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 6 | 12 | 10 | 10 | 22 | 18 | 8 | 4 | 2 | . | . | 2 | 12 | 12 | 4 | . | 4 | . | 4 | . | ||||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 2 | 10 | 2 | . | . | . | . | ||||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | 4 | . | 10 | . | 6 | 4 | 6 | . | . | ||||||
| Green-veined White | . | . | . | . | 4 | 4 | . | . | . | . | . | . | 2 | . | . | 6 | . | . | . | . | ||||||
| Orange Tip | . | 2 | . | 4 | 4 | 8 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | 2 | 6 | . | . | . | . | . | . | . | 2 | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | ||||||
| Common Blue | . | . | . | . | . | 2 | 28 | 20 | 22 | 8 | 2 | . | . | . | 8 | 16 | 42 | 12 | 6 | . | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||||
| Holly Blue | . | . | . | . | . | 2 | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||||
| Small Tortoiseshell | 4 | 2 | . | 2 | 2 | . | . | . | . | 2 | . | 4 | . | . | . | . | 6 | 2 | 14 | . | ||||||
| Peacock | . | 2 | 2 | . | . | . | . | . | . | . | . | . | 2 | 2 | 2 | 2 | . | . | . | . | ||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||||
| Speckled Wood | . | 8 | 8 | 6 | 4 | 6 | 2 | 4 | . | 2 | 2 | 2 | 8 | 10 | 6 | 8 | 8 | 4 | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 4 | 6 | 16 | 14 | 4 | 8 | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 24 | 102 | 158 | 156 | 188 | 150 | 154 | 150 | 58 | 46 | 32 | 6 | . | ||||||
| Small Heath | . | . | . | . | 4 | 20 | 76 | 108 | 276 | 116 | 126 | 64 | 34 | 12 | 10 | 10 | 4 | 4 | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | 2 | 6 | 66 | 28 | 52 | . | . | . | . | . | . | . | . | ||||||