
| 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 | ||||||||||||||||||||||||||
| Small/Essex Skipper | . | . | . | . | . | . | . | . | . | 38 | 162 | 62 | 10 | 6 | 3 | . | . | . | . | . | ||||||
| Small Skipper | . | . | . | . | . | . | . | . | . | 3 | 19 | 2 | . | 2 | . | 1 | . | . | . | . | ||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | 155 | 316 | 115 | 31 | 9 | 6 | . | . | . | . | . | ||||||
| Large White | . | . | . | . | . | 5 | . | 1 | . | 1 | 6 | 11 | 13 | 5 | 4 | 1 | 1 | 1 | . | . | ||||||
| Small White | . | . | 1 | . | 3 | 8 | . | . | . | 2 | 2 | 8 | 30 | 6 | 2 | 4 | 9 | 2 | 5 | . | ||||||
| Green-veined White | . | 1 | 8 | 6 | 5 | 17 | . | 2 | . | 4 | 6 | 8 | 6 | . | 2 | 1 | 1 | 1 | 4 | . | ||||||
| Orange Tip | . | . | 2 | 2 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | 3 | 8 | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| White-letter Hairstreak | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | 1 | . | 8 | . | 1 | 1 | . | . | 2 | 1 | . | 3 | 2 | 1 | 1 | . | . | ||||||
| Brown Argus | . | . | . | . | 6 | 19 | 5 | 9 | . | . | . | 2 | 2 | 2 | 8 | 3 | 3 | . | . | . | ||||||
| Common Blue | . | . | . | . | 1 | 15 | 18 | 30 | . | . | . | 1 | 3 | 3 | 3 | 4 | 6 | 1 | 1 | . | ||||||
| Holly Blue | . | . | . | 1 | . | 5 | . | 1 | . | . | 2 | 2 | 3 | 3 | 1 | 1 | 1 | 1 | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | 2 | 3 | 2 | 1 | 5 | 1 | 1 | . | 1 | 2 | 1 | 9 | 1 | ||||||
| Small Tortoiseshell | 1 | . | . | . | . | 1 | . | . | . | . | 1 | 2 | . | . | . | . | 1 | 1 | 5 | 1 | ||||||
| Peacock | 2 | . | 6 | 4 | 2 | 3 | . | . | . | . | . | . | 4 | 9 | 6 | . | 1 | 1 | . | . | ||||||
| Comma | 1 | . | . | 1 | . | . | . | . | . | 1 | 2 | 2 | 3 | 1 | . | . | 2 | . | 1 | . | ||||||
| Speckled Wood | . | 3 | 5 | 5 | . | 1 | . | 10 | . | 3 | 1 | 5 | 9 | 1 | 1 | 5 | 10 | 7 | 15 | 5 | ||||||
| Wall Brown | . | . | . | 4 | 11 | 33 | 2 | . | . | . | . | . | 1 | 2 | 9 | 7 | 4 | 2 | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 2 | 122 | 160 | 42 | 28 | 16 | 3 | 3 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 9 | 218 | 338 | 292 | 65 | 41 | 46 | 9 | 17 | 7 | 4 | . | ||||||
| Small Heath | . | . | . | . | 1 | 5 | 12 | 19 | 6 | . | . | . | . | . | . | . | 3 | 3 | 3 | . | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 1 | 58 | 54 | 26 | 1 | . | . | . | . | . | . | . | ||||||