
| 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 | 6 | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | . | |||||||
| Small Skipper | NI | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | |||||||
| Essex Skipper | 6 | . | . | . | . | . | . | . | . | . | 2 | 2 | 1 | . | . | . | . | . | . | . | |||||||
| Large Skipper | 26 | . | . | . | . | . | . | 2 | 6 | 12 | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | NI | 3 | 4 | . | 4 | . | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Large White | 54 | . | 1 | . | 3 | 1 | 1 | . | . | 4 | 14 | 4 | 6 | 1 | . | 3 | 3 | . | . | . | |||||||
| Small White | 40 | . | . | . | . | . | . | . | . | 1 | 6 | 10 | 11 | . | 3 | 2 | 2 | . | . | . | |||||||
| Green-veined White | 8 | . | . | 1 | 2 | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 4 | . | . | . | . | . | 1 | . | . | 1 | . | . | 1 | . | . | . | . | . | 1 | . | |||||||
| Brown Argus | 3 | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | |||||||
| Common Blue | 26 | . | . | . | . | 2 | . | 1 | 1 | . | 3 | 11 | 4 | 2 | . | . | . | . | . | . | |||||||
| Holly Blue | 4 | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | |||||||
| Red Admiral | 33 | . | . | . | . | . | 1 | . | . | 6 | . | . | 2 | . | 1 | . | 1 | 5 | 4 | 5 | |||||||
| Painted Lady | 16 | . | . | . | . | 3 | 2 | . | . | 2 | . | 7 | . | 1 | . | . | . | . | . | . | |||||||
| Small Tortoiseshell | NI | 2 | 9 | . | 1 | . | . | . | . | 5 | . | . | . | . | . | . | . | . | . | . | |||||||
| Peacock | NI | 9 | 4 | . | 3 | . | 1 | . | . | . | 3 | 1 | . | . | . | . | 2 | . | . | . | |||||||
| Comma | 21 | . | . | . | . | . | . | . | 1 | 4 | 1 | 3 | . | . | . | . | 3 | 2 | 4 | 1 | |||||||
| Speckled Wood | 14 | . | . | . | . | . | 1 | . | 6 | . | 1 | 1 | . | . | . | 3 | . | . | 2 | . | |||||||
| Marbled White | 196 | . | . | . | . | . | . | 3 | 43 | 87 | 13 | . | . | . | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 354 | . | . | . | . | . | . | . | 1 | 95 | 76 | 70 | 20 | 2 | . | . | . | . | . | . | |||||||
| Meadow Brown | 835 | . | . | . | . | . | 8 | 82 | 146 | 179 | 143 | 57 | 37 | 13 | 1 | 2 | . | . | . | . | |||||||
| Ringlet | 213 | . | . | . | . | . | 3 | 32 | 68 | 74 | . | . | . | . | . | . | . | . | . | . | |||||||