
| 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 | . | . | . | . | 4 | 30 | 31 | 30 | 23 | 7 | . | . | . | . | ||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | . | . | . | . | . | . | ||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 5 | 2 | 1 | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | 3 | 3 | 1 | 2 | 5 | . | 3 | 8 | . | 1 | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | 7 | 4 | 3 | 4 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | 1 | 6 | 7 | 2 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 1 | . | 2 | 13 | 5 | . | 5 | 2 | . | . | . | . | . | . | . | 1 | 9 | 8 | 16 | 3 | . | 4 | ||||
| Large White | . | . | . | 1 | . | 1 | 5 | 1 | . | . | . | . | . | . | . | . | 6 | . | 4 | 1 | . | . | ||||
| Small White | . | . | . | . | . | 1 | 13 | . | . | . | . | . | . | . | 2 | 3 | 5 | 2 | 4 | 2 | . | . | ||||
| Green-veined White | . | . | . | 3 | 4 | . | 2 | 1 | . | . | . | . | . | . | 2 | 7 | 5 | 3 | 2 | . | . | . | ||||
| Orange Tip | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | . | 3 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | 1 | 1 | 2 | . | . | . | . | . | . | . | 2 | 10 | 5 | 6 | 11 | 8 | 1 | . | 5 | ||||
| Brown Argus | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | 2 | . | 1 | 2 | . | 1 | ||||
| Common Blue | . | . | . | . | 1 | 14 | 36 | 36 | 7 | 6 | 2 | . | . | . | . | 2 | 34 | 100 | 66 | 42 | 4 | 14 | ||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Tortoiseshell | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | 4 | 5 | 2 | 2 | 4 | 1 | 6 | 1 | 5 | ||||
| Peacock | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 2 | 1 | 1 | . | . | ||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | . | 2 | 5 | 4 | . | 2 | 2 | 1 | 1 | 2 | . | . | . | . | 1 | 4 | 3 | 5 | 1 | . | 2 | ||||
| Wall Brown | . | . | . | . | 2 | . | 3 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | 1 | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 7 | 48 | 34 | 10 | 2 | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 9 | 20 | 6 | 12 | 1 | 1 | 3 | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 4 | 69 | 116 | 182 | 132 | 252 | 290 | 274 | 220 | 205 | 176 | 144 | 22 | . | ||||
| Small Heath | . | . | . | 2 | 11 | 16 | 22 | 13 | 12 | 20 | . | 16 | 10 | 42 | 30 | 11 | 11 | 7 | 2 | . | . | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | 1 | 1 | . | . | . | . | . | . | ||||