
| 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 | . | . | . | . | . | . | . | . | . | . | 3 | 9 | 80 | 233 | 225 | 40 | 54 | 26 | 2 | . | . | . | . | |||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 4 | 2 | . | . | . | . | . | . | |||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | 2 | 1 | 4 | 10 | 5 | 3 | 2 | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | . | . | . | 1 | 2 | 4 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 2 | 4 | 4 | 3 | . | . | . | . | |||
| Brimstone | . | 1 | . | . | . | . | . | 1 | 5 | 1 | 1 | . | . | 2 | 5 | 3 | 32 | . | 6 | . | . | . | . | |||
| Large White | . | . | . | . | . | . | . | 3 | 2 | 1 | . | . | . | 2 | 3 | 1 | 2 | . | . | . | . | . | . | |||
| Small White | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 2 | 6 | 9 | 1 | 1 | 1 | . | . | . | |||
| Green Hairstreak | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | . | 2 | 2 | 3 | . | . | . | . | 7 | 6 | 5 | 13 | 4 | 17 | 1 | . | 2 | 3 | |||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 2 | 4 | . | 1 | . | . | |||
| Common Blue | . | . | . | . | . | . | . | 7 | 28 | 20 | 14 | 6 | 1 | 2 | 20 | 72 | 198 | 140 | 124 | 3 | . | 1 | . | |||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 6 | 6 | 6 | . | . | . | . | . | |||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | 2 | . | . | 1 | 1 | 1 | . | 1 | 1 | 1 | 1 | . | . | . | 1 | 3 | . | 2 | . | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 2 | . | . | . | . | . | . | |||
| Small Tortoiseshell | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | |||
| Peacock | . | 2 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | 3 | 7 | 4 | . | . | . | . | . | . | |||
| Comma | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 3 | 2 | 4 | . | . | . | . | . | . | . | |||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | 2 | 1 | 2 | 1 | |||
| Wall Brown | . | . | . | . | . | . | . | 9 | 3 | . | . | . | . | . | . | 2 | 6 | . | 2 | . | . | . | . | |||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 8 | 39 | 94 | 97 | 79 | 9 | 2 | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 6 | 15 | 34 | 37 | 14 | 9 | 6 | . | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | 69 | 52 | 69 | 104 | 98 | 91 | 82 | 57 | 50 | 18 | 8 | 5 | . | |||
| Small Heath | . | . | . | . | . | . | 2 | 3 | 10 | 11 | 42 | 23 | 28 | 13 | 4 | 7 | 5 | 21 | 45 | 17 | 8 | 3 | 1 | |||