
| 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 Skipper | 102 | . | . | . | . | . | . | . | . | . | . | 28 | 35 | 10 | 3 | . | . | . | . | ||||||||
| Essex Skipper | 9 | . | . | . | . | . | . | . | . | . | . | 1 | . | 6 | . | . | . | . | . | ||||||||
| Large Skipper | 91 | . | . | . | . | 1 | 8 | 26 | 15 | 20 | . | 1 | 2 | . | . | . | . | . | . | ||||||||
| Dingy Skipper | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | 3 | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Wood White | 10 | . | . | . | 1 | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 29 | 1 | 2 | 12 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Large White | 4 | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Small White | 5 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | ||||||||
| Green-veined White | 52 | . | . | 13 | 4 | 5 | 1 | 1 | . | . | . | . | 3 | 7 | 3 | . | . | . | . | ||||||||
| Orange Tip | 9 | . | . | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Small Copper | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Common Blue | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| White Admiral | 16 | . | . | . | . | . | . | . | . | . | . | 4 | 8 | . | . | . | . | . | . | ||||||||
| Purple Emperor | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 2 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Peacock | 13 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | ||||||||
| Comma | 4 | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Pearl-bordered Fritillary | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | 125 | . | 6 | 3 | 1 | 8 | 3 | 17 | 12 | 7 | . | 1 | 2 | 24 | 6 | . | 3 | 2 | 2 | ||||||||
| Marbled White | 4 | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 78 | . | . | . | . | . | . | . | . | . | . | . | 15 | 32 | 7 | . | . | . | . | ||||||||
| Meadow Brown | 377 | . | . | . | . | . | . | 3 | 28 | 88 | 42 | 92 | 64 | 16 | 2 | . | . | . | . | ||||||||
| Small Heath | 3 | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Ringlet | 170 | . | . | . | . | . | . | . | 1 | 7 | 32 | 53 | 40 | 11 | . | . | . | . | . | ||||||||
| Unknown White | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||||