
| 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 Skipper | . | . | . | . | . | . | . | . | 2 | 45 | 76 | 40 | 9 | 4 | 2 | 1 | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | 2 | 1 | 13 | 33 | 8 | 5 | 1 | 1 | . | 1 | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | 4 | 14 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | 9 | 6 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 21 | 2 | 42 | 29 | 29 | 7 | 1 | 3 | 6 | . | 2 | 1 | 7 | 19 | 21 | 1 | 9 | 18 | 2 | 2 | ||||||
| Large White | . | . | . | 1 | 3 | . | . | . | . | . | 5 | . | 4 | 9 | 11 | 4 | 10 | 4 | . | . | ||||||
| Small White | . | . | . | 4 | 17 | 1 | . | 2 | 3 | 4 | 9 | 35 | 30 | 47 | 44 | 21 | 17 | 16 | 6 | 1 | ||||||
| Green-veined White | . | . | 4 | 2 | 3 | . | . | . | . | . | 1 | 2 | 11 | 7 | 11 | 1 | . | . | . | . | ||||||
| Orange Tip | . | . | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | 3 | 5 | 8 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | 6 | 4 | 10 | . | . | . | 1 | 7 | 8 | 8 | 2 | 1 | 2 | 1 | 1 | 4 | 6 | 3 | ||||||
| Small Blue | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | 3 | 1 | 1 | 1 | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | ||||||
| Common Blue | . | . | . | 8 | 48 | 16 | 2 | 4 | 2 | . | 1 | . | . | 2 | 8 | . | 2 | 1 | . | . | ||||||
| Holly Blue | . | . | 3 | 8 | 8 | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | 1 | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | 1 | . | . | . | 2 | 1 | 2 | . | . | . | 1 | . | . | 1 | 1 | 1 | ||||||
| Painted Lady | 1 | . | . | . | . | . | 1 | 3 | 2 | . | . | . | 1 | . | 6 | . | . | . | . | . | ||||||
| Small Tortoiseshell | . | . | . | . | 1 | . | . | 1 | 8 | 6 | 17 | 13 | 5 | 4 | . | 1 | 20 | 30 | 26 | 27 | ||||||
| Peacock | 10 | 2 | 2 | 1 | 3 | . | . | . | . | . | . | 5 | 11 | 10 | 12 | 4 | 4 | . | 1 | 1 | ||||||
| Comma | 7 | 2 | . | 3 | 1 | . | . | . | . | 5 | 6 | 2 | 3 | 2 | 1 | . | 2 | . | 1 | . | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | 17 | 4 | 14 | 2 | 2 | . | . | . | . | . | . | . | ||||||
| Speckled Wood | . | . | 2 | . | 3 | 1 | 1 | 1 | 5 | 1 | 1 | 1 | 4 | 2 | 3 | 2 | 1 | 1 | 4 | 3 | ||||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 17 | 60 | 102 | 65 | 30 | 22 | 4 | 2 | 1 | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | 2 | 8 | 88 | 148 | 213 | 311 | 168 | 221 | 258 | 146 | 93 | 89 | 19 | 16 | ||||||
| Small Heath | . | . | . | 14 | 19 | 6 | . | 12 | 28 | 18 | 13 | . | 1 | 1 | 1 | . | 4 | 2 | 1 | . | ||||||
| Ringlet | . | . | . | . | . | . | . | 2 | 31 | 40 | 77 | 22 | 4 | . | . | . | . | . | . | . | ||||||