
| 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 | Ind | ||||||||||||||||||||||||||
| Small/Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||||
| Small Skipper | NI | . | . | . | . | . | . | 2 | 1 | . | . | . | . | 4 | . | . | . | . | . | . | . | ||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | ||||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | ||||||
| Brimstone | 28 | 6 | . | 5 | 6 | 1 | 1 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Large White | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Green-veined White | NI | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 3 | 10 | 4 | . | 2 | 1 | . | . | ||||||
| Orange Tip | 2 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Common Blue | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Holly Blue | 4 | . | . | . | 1 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| White Admiral | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Red Admiral | 13 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | ||||||
| Small Tortoiseshell | 3 | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Peacock | 28 | 9 | 1 | 3 | 3 | 1 | . | . | 3 | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Speckled Wood | 23 | . | . | . | . | 2 | 3 | . | . | 1 | 2 | 2 | 5 | . | . | 2 | . | 3 | 2 | . | . | ||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | . | 17 | 13 | 7 | . | . | . | . | . | ||||||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | . | 1 | 8 | 20 | 17 | 9 | 2 | 2 | . | 1 | . | . | ||||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | 1 | 9 | 20 | 16 | . | . | . | . | . | . | . | ||||||