
| 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 | . | . | . | . | . | . | 1 | 19 | 14 | 39 | 18 | 33 | 21 | . | . | . | . | |||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | 8 | . | 1 | . | . | . | . | |||||||||
| Large Skipper | . | . | . | . | . | 26 | 30 | 24 | 27 | 37 | 15 | 1 | 2 | . | . | . | . | |||||||||
| Dingy Skipper | . | . | . | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | . | 1 | . | 3 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||||||
| Brimstone | 1 | 3 | 1 | . | . | . | 1 | . | . | 4 | . | 1 | . | . | . | . | . | |||||||||
| Large White | . | . | 7 | 2 | . | . | . | 5 | 2 | 5 | 3 | 16 | 1 | . | 1 | 2 | . | |||||||||
| Small White | 1 | . | 8 | 2 | . | . | . | 1 | . | 7 | 1 | 18 | 2 | 5 | 4 | 9 | 4 | |||||||||
| Green-veined White | 1 | 2 | 4 | 5 | 2 | . | . | . | 7 | 2 | 28 | 20 | 20 | 11 | 9 | 3 | 7 | |||||||||
| Orange Tip | 6 | 19 | 6 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Purple Hairstreak | . | . | . | . | . | . | 8 | 2 | 8 | 5 | 1 | 8 | 1 | 1 | . | . | . | |||||||||
| Black Hairstreak | . | . | . | . | . | 50 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | 5 | 7 | 1 | . | . | . | . | 2 | 3 | 5 | 7 | 3 | 1 | 1 | |||||||||
| Brown Argus | . | . | . | . | 2 | 1 | . | . | . | . | 2 | . | 6 | 10 | 1 | . | . | |||||||||
| Common Blue | . | . | . | 3 | 14 | 16 | . | . | . | . | 4 | 17 | 41 | 129 | 21 | 6 | 1 | |||||||||
| Holly Blue | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| White Admiral | . | . | . | . | . | . | 11 | 2 | 2 | . | 2 | . | . | . | . | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | |||||||||
| Painted Lady | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | |||||||||
| Small Tortoiseshell | 2 | . | . | . | . | . | 1 | 2 | . | 2 | . | . | . | . | . | 1 | . | |||||||||
| Peacock | 1 | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| Comma | . | . | . | . | . | . | 2 | 2 | 3 | 1 | . | . | . | . | . | 3 | 2 | |||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | 2 | 3 | 2 | 1 | 3 | 8 | 3 | . | . | . | 3 | 3 | 4 | 12 | 15 | 6 | 7 | |||||||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||||||||
| Marbled White | . | . | . | . | . | . | 120 | 176 | 92 | 98 | 17 | 22 | 4 | . | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 22 | 62 | 237 | 114 | 129 | 25 | . | . | . | |||||||||
| Meadow Brown | . | . | . | . | . | 83 | 292 | 414 | 286 | 638 | 291 | 208 | 64 | 25 | . | . | . | |||||||||
| Small Heath | . | . | . | . | 1 | 2 | 2 | . | . | . | . | . | 5 | 4 | 1 | 3 | . | |||||||||
| Ringlet | . | . | . | . | . | 4 | 162 | 253 | 97 | 84 | 38 | 23 | 6 | . | . | . | . | |||||||||