
| 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 | . | . | . | . | . | . | . | . | . | . | 7 | 21 | 45 | 142 | 134 | 37 | . | 1 | . | . | . | |||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 2 | 10 | 3 | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | . | . | . | 1 | 3 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | . | . | 6 | 5 | 2 | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | . | 1 | . | . | . | . | 1 | 1 | . | 1 | . | 1 | . | . | 2 | 5 | . | 1 | . | . | . | |||||
| Large White | . | . | . | . | 1 | 1 | . | . | . | . | . | . | 1 | 10 | 8 | 5 | 1 | 4 | . | . | . | |||||
| Small White | . | . | . | 1 | . | . | . | . | 2 | . | . | 1 | 4 | 12 | 17 | 15 | 1 | 5 | 9 | 5 | . | |||||
| Green-veined White | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | . | . | 1 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | 1 | 1 | 4 | 4 | 1 | 1 | 1 | . | 1 | 1 | 4 | 11 | 8 | 2 | 8 | 12 | 30 | 32 | |||||
| Brown Argus | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | 3 | . | 8 | 1 | 1 | . | |||||
| Common Blue | . | . | . | . | . | 1 | 5 | 18 | 12 | 12 | 3 | 1 | . | 1 | 3 | 44 | 28 | 40 | 16 | 11 | . | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 17 | 32 | 21 | 14 | 1 | 1 | . | |||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | 1 | 1 | . | . | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 1 | 4 | . | . | . | |||||
| Peacock | . | 2 | . | 1 | . | 2 | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 1 | 3 | 1 | 1 | . | . | . | . | . | |||||
| Speckled Wood | 1 | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | 1 | . | 6 | 2 | 1 | . | |||||
| Wall Brown | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | 19 | 6 | 5 | 1 | . | 5 | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 16 | 20 | 20 | 15 | . | . | . | . | . | . | |||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 4 | 10 | 5 | 1 | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 1 | 17 | 28 | 65 | 54 | 57 | 46 | 155 | 131 | 130 | 71 | 42 | 4 | |||||
| Small Heath | . | . | . | . | . | 1 | 8 | 7 | 1 | 7 | 7 | 9 | 6 | 4 | . | 10 | 14 | 42 | 56 | 31 | 1 | |||||