
| 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 | . | . | . | . | . | . | . | 3 | 4 | 4 | 6 | 2 | 7 | 3 | . | . | . | . | ||||||||
| Swallowtail | . | . | . | . | 3 | 1 | 7 | 7 | 9 | 8 | 5 | . | 1 | 1 | . | . | . | . | ||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | ||||||||
| Brimstone | 8 | 9 | 10 | 9 | 15 | 9 | 4 | 5 | . | . | . | 3 | 6 | 7 | 9 | . | . | . | ||||||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | 4 | 2 | . | . | . | . | . | ||||||||
| Green-veined White | . | . | . | 19 | 14 | 6 | 1 | . | . | . | 13 | 107 | 92 | 52 | 52 | 9 | 12 | 8 | ||||||||
| Orange Tip | 1 | 2 | 13 | 10 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| White Admiral | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | ||||||||
| Red Admiral | . | . | . | . | . | . | . | 1 | 1 | 2 | . | 1 | 1 | 1 | 1 | . | . | 1 | ||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 3 | 4 | 3 | 2 | 3 | 1 | . | 2 | 4 | 8 | 6 | 7 | 4 | 2 | 2 | . | . | . | ||||||||
| Peacock | 4 | 5 | 5 | 3 | 3 | 2 | . | . | . | . | . | 20 | 42 | 44 | 41 | . | . | . | ||||||||
| Comma | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 5 | 3 | 2 | . | . | 1 | ||||||||
| Speckled Wood | . | . | 2 | 1 | 1 | . | . | 2 | 3 | 3 | 3 | 6 | 2 | 3 | 1 | 2 | 4 | 1 | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 1 | 9 | 12 | 10 | . | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 2 | . | 7 | 14 | 9 | 5 | 5 | 4 | . | . | . | ||||||||
| Small Heath | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | ||||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 5 | 19 | 10 | 3 | 1 | . | . | . | . | ||||||||