
| 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 | . | . | . | . | . | . | . | . | . | 137 | 133 | 177 | 28 | . | . | . | . | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | 5 | . | 81 | 82 | 30 | . | 1 | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||||
| Large White | . | . | . | . | . | . | . | 3 | . | . | . | 2 | . | . | . | . | . | 11 | ||||||||
| Small White | 1 | 2 | . | 3 | 2 | 1 | 3 | 7 | 9 | 22 | 10 | 34 | 12 | 17 | 28 | 36 | 13 | 32 | ||||||||
| Green-veined White | . | . | 7 | 13 | 16 | 4 | . | 2 | 2 | 69 | 38 | 55 | 23 | 25 | 26 | 7 | 12 | 3 | ||||||||
| Orange Tip | . | 1 | 6 | 12 | 22 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Common Blue | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | 1 | . | . | . | . | ||||||||
| Holly Blue | . | . | 2 | . | . | 1 | 1 | . | . | . | . | . | . | . | 3 | 2 | . | . | ||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 2 | . | 1 | . | 4 | ||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 2 | . | 1 | . | . | . | . | . | . | . | 3 | 11 | . | 1 | 18 | 38 | 9 | 23 | ||||||||
| Peacock | 2 | 2 | 4 | 3 | 2 | 1 | . | . | . | . | . | 6 | 5 | . | . | 1 | . | . | ||||||||
| Comma | . | . | . | 1 | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | 3 | ||||||||
| Wall Brown | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 5 | 3 | 5 | 1 | . | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 1 | 56 | 322 | 128 | 6 | . | . | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 2 | 3 | 36 | 20 | 12 | 7 | . | . | . | . | . | ||||||||
| Small Heath | . | . | . | . | 3 | 5 | 9 | 10 | 16 | 6 | 6 | 4 | . | 5 | . | 1 | 4 | 4 | ||||||||
| Unknown White | . | . | . | . | . | . | . | . | . | . | 79 | 128 | 22 | 26 | 22 | 11 | 11 | 16 | ||||||||