
| 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 | 74 | . | . | . | . | . | . | . | 1 | 14 | 17 | 21 | . | . | . | . | . | . | . | ||||||||
| Large Skipper | 15 | . | . | . | . | 1 | . | 4 | 6 | . | 3 | . | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Brimstone | NI | 1 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Large White | NI | . | 4 | 10 | 13 | 2 | 3 | 1 | 1 | 4 | 14 | 18 | 7 | 1 | 16 | 1 | 2 | . | . | ||||||||
| Small White | NI | 2 | 8 | 9 | 5 | 2 | 5 | . | . | . | 2 | 10 | 2 | . | 3 | . | . | . | . | ||||||||
| Green-veined White | NI | . | 1 | 1 | 2 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Orange Tip | NI | 5 | 21 | 5 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | NI | . | 4 | 4 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | NI | . | . | . | . | . | . | . | . | . | 12 | 6 | 6 | . | 1 | . | 1 | . | . | ||||||||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | 80 | . | . | 1 | 1 | 8 | 5 | . | . | . | . | 9 | 17 | 3 | 2 | . | . | . | 4 | ||||||||
| Common Blue | 391 | . | . | . | . | 1 | 17 | 7 | 2 | . | . | 1 | 127 | 72 | 16 | 10 | 1 | . | . | ||||||||
| Holly Blue | 9 | . | . | 3 | . | . | 1 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | ||||||||
| White Admiral | 5 | . | . | . | . | . | . | 1 | 1 | . | 1 | 1 | . | . | . | . | . | . | . | ||||||||
| Red Admiral | 43 | 1 | 2 | 1 | . | . | . | 2 | 1 | 3 | 4 | 8 | 2 | . | 1 | . | . | 4 | . | ||||||||
| Painted Lady | 15 | . | . | . | 3 | . | 1 | 4 | . | . | 3 | . | . | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | NI | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Peacock | NI | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Comma | 34 | 1 | . | . | . | . | 1 | 1 | . | 3 | 6 | 1 | 1 | . | 1 | . | 6 | 6 | 2 | ||||||||
| Speckled Wood | 95 | . | 3 | 2 | . | . | 4 | 2 | 2 | . | 1 | 2 | 13 | . | 6 | 6 | 1 | 21 | 8 | ||||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | 28 | 136 | 356 | 98 | 5 | . | . | . | . | . | ||||||||
| Meadow Brown | 2020 | . | . | . | . | . | . | 152 | 431 | 330 | 247 | 256 | 121 | 24 | 21 | 6 | 1 | . | . | ||||||||
| Ringlet | 100 | . | . | . | . | . | . | 9 | 38 | 39 | 11 | . | . | . | . | . | . | . | . | ||||||||