
| 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 | 3 | 54 | 4 | 19 | 8 | . | 3 | 2 | . | . | |||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | . | . | . | |||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | 1 | . | . | 3 | 8 | 7 | 1 | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | 2 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | . | . | 2 | 1 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 2 | 3 | . | 4 | 2 | 2 | 4 | 3 | . | . | . | 1 | . | . | . | . | 5 | 9 | 3 | 6 | 2 | 2 | 2 | |||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Small White | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | 4 | . | 1 | 2 | 2 | 9 | . | . | . | |||
| Green-veined White | . | . | . | . | 9 | 11 | 9 | 8 | 6 | . | . | 1 | . | . | 1 | 1 | 10 | 17 | 3 | 7 | 3 | . | . | |||
| Orange Tip | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 3 | 3 | 11 | 6 | 8 | 10 | 3 | 3 | . | |||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | |||
| Common Blue | . | . | . | . | . | . | 2 | 19 | 13 | . | 1 | 5 | 10 | . | 1 | . | 1 | 7 | 6 | 17 | 9 | 10 | 4 | |||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||
| Red Admiral | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 7 | . | 1 | . | . | . | . | 5 | . | |||
| Peacock | . | 4 | 1 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | 11 | 2 | 1 | . | . | . | . | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | |||
| Speckled Wood | . | . | . | . | . | 2 | 2 | . | 1 | . | . | 1 | . | 1 | . | . | 2 | 4 | 3 | . | . | 2 | 1 | |||
| Wall Brown | . | . | . | . | . | . | 6 | 2 | . | . | . | . | . | . | . | . | 3 | . | 1 | 4 | . | 4 | . | |||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 1 | 17 | 30 | 28 | . | 5 | 4 | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 15 | 3 | 4 | . | . | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | 2 | 18 | . | 39 | 94 | 128 | 132 | 177 | 60 | 82 | 70 | 50 | 44 | 8 | 11 | 4 | |||
| Small Heath | . | . | . | . | . | 5 | 35 | 34 | 29 | . | 5 | 11 | 26 | 14 | 22 | 5 | 5 | 3 | 2 | 1 | 3 | . | . | |||
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | |||
| Unknown White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 14 | 2 | 11 | . | . | . | . | . | . | |||