
| 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 | 11 | . | . | . | . | . | . | . | . | . | . | 2 | 15 | 5 | 6 | 1 | 2 | . | 1 | . | . | . | |||||
| Small Skipper | 4 | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | 1 | . | . | . | . | . | . | |||||
| Essex Skipper | 7 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 6 | . | . | . | . | . | . | |||||
| Large Skipper | 45 | . | . | . | . | . | . | 1 | 2 | 18 | 13 | 11 | . | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 26 | 3 | . | 6 | 1 | 1 | 2 | 4 | 2 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | |||||
| Large White | 79 | . | . | . | . | 1 | 2 | 4 | . | 2 | 4 | 5 | 8 | 12 | 15 | 11 | 5 | 2 | 3 | 1 | . | 3 | |||||
| Small White | 127 | . | . | 4 | 1 | . | 1 | 2 | . | . | . | 4 | 12 | 35 | 38 | 9 | 9 | 6 | 1 | 2 | 1 | . | |||||
| Green-veined White | 4 | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Small Copper | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Common Blue | 4 | . | . | . | . | 2 | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Holly Blue | 12 | . | . | 4 | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | 1 | 1 | . | . | |||||
| Red Admiral | 14 | 1 | . | . | . | . | . | 1 | . | 1 | . | 2 | 1 | 2 | . | . | . | . | . | 3 | 2 | 1 | |||||
| Small Tortoiseshell | 37 | 6 | 1 | 1 | 1 | . | . | . | . | 5 | 4 | 2 | 5 | . | . | . | . | . | 1 | 2 | . | . | |||||
| Peacock | 41 | 4 | 1 | 3 | . | 3 | 1 | 1 | . | . | . | . | . | 15 | 5 | . | . | . | . | . | . | . | |||||
| Comma | 7 | 1 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | 1 | . | |||||
| Speckled Wood | 12 | . | . | . | . | . | . | 1 | . | 1 | 3 | 2 | . | . | . | . | 1 | . | 1 | 1 | . | 2 | |||||
| Marbled White | 146 | . | . | . | . | . | . | . | . | 5 | 43 | 52 | 19 | 26 | 1 | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 478 | . | . | . | . | . | . | . | . | . | 1 | 16 | 78 | 210 | 128 | 33 | 10 | 1 | . | 1 | . | . | |||||
| Meadow Brown | 489 | . | . | . | . | . | . | . | 1 | 78 | 81 | 132 | 72 | 50 | 44 | 25 | 3 | 2 | 1 | . | . | . | |||||
| Ringlet | 94 | . | . | . | . | . | . | . | . | 22 | 16 | 34 | 21 | 1 | . | . | . | . | . | . | . | . | |||||