
| 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 | . | . | . | . | . | . | . | 10 | 55 | 47 | 20 | 21 | 9 | 1 | . | . | . | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | 18 | . | . | . | . | . | . | . | . | . | ||||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 2 | . | 1 | ||||||||
| Large Skipper | . | . | . | . | . | . | 8 | . | 16 | . | . | . | . | . | . | . | . | . | ||||||||
| Dingy Skipper | . | . | . | 12 | 9 | 5 | 3 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 1 | . | . | 1 | 1 | . | . | . | . | . | . | . | 5 | . | 8 | 3 | 3 | 2 | ||||||||
| Large White | . | . | . | 1 | 2 | 4 | . | . | . | . | 1 | 13 | 11 | 12 | 8 | 1 | . | . | ||||||||
| Small White | . | . | . | 4 | 5 | 2 | . | . | . | 4 | 30 | 90 | 165 | 25 | 17 | 2 | 1 | . | ||||||||
| Green-veined White | . | . | . | 2 | 1 | 2 | . | . | . | . | 4 | 4 | 17 | 4 | . | . | 1 | . | ||||||||
| Green Hairstreak | . | . | . | 1 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | . | . | 1 | . | ||||||||
| Brown Argus | . | . | . | . | 1 | 2 | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | ||||||||
| Common Blue | . | . | . | . | 23 | 58 | 16 | 8 | 5 | . | . | 5 | 18 | 25 | 23 | 21 | 7 | 21 | ||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | 8 | 19 | 16 | 2 | 2 | 1 | . | 1 | ||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | ||||||||
| Small Tortoiseshell | . | . | . | . | . | 2 | . | . | . | 1 | 3 | 2 | . | . | . | . | . | 1 | ||||||||
| Peacock | . | 2 | . | . | . | . | . | . | . | . | . | 4 | 9 | 2 | 1 | . | . | . | ||||||||
| Comma | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | 1 | 8 | 2 | 1 | 1 | . | . | . | . | . | . | ||||||||
| Speckled Wood | . | . | . | . | . | 1 | 5 | 5 | 3 | 1 | 1 | 3 | 9 | 5 | . | 1 | 3 | 6 | ||||||||
| Wall Brown | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||||
| Marbled White | . | . | . | . | . | . | . | 16 | 90 | 44 | 37 | 8 | 1 | . | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 1 | 2 | 10 | 7 | 5 | . | 1 | . | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | 23 | 77 | 103 | 63 | 98 | 127 | 139 | 97 | 137 | 141 | 81 | 63 | ||||||||
| Small Heath | . | . | . | 2 | 26 | 22 | 22 | 28 | 42 | 20 | 16 | 9 | 4 | 1 | 2 | 3 | 1 | . | ||||||||
| Ringlet | . | . | . | . | . | . | . | 22 | 26 | 15 | . | 1 | . | . | . | . | . | . | ||||||||