
| 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 | 3 | 4 | 11 | . | . | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | . | 1 | 1 | . | . | 2 | 1 | 1 | . | . | . | . | ||||||||
| Dingy Skipper | . | . | . | . | 1 | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | ||||||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | 7 | 4 | . | ||||||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | ||||||||
| Green Hairstreak | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | 1 | 3 | 1 | 3 | ||||||||
| Brown Argus | . | . | . | . | 2 | . | 34 | 14 | . | . | . | . | . | . | . | 1 | 10 | . | ||||||||
| Common Blue | . | . | . | . | . | 2 | 19 | 24 | 1 | . | . | . | 5 | 20 | 47 | 41 | 8 | . | ||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 50 | 15 | . | . | . | ||||||||
| Adonis Blue | . | . | . | . | . | . | 71 | 9 | . | . | . | . | . | 1 | 18 | 41 | 2 | . | ||||||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | 2 | 4 | 2 | ||||||||
| Painted Lady | . | . | . | . | . | . | . | 2 | 1 | 2 | . | . | 1 | 1 | 1 | 2 | 2 | 1 | ||||||||
| Peacock | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | ||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||||
| Wall Brown | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Marbled White | . | . | . | . | . | . | . | . | 17 | 46 | 31 | 59 | 11 | 4 | . | . | . | . | ||||||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 2 | 11 | 20 | 18 | 2 | . | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 6 | 19 | 20 | 46 | 33 | 64 | 43 | 19 | 11 | . | ||||||||
| Small Heath | . | . | . | . | . | . | 3 | . | 5 | 11 | 5 | 3 | 1 | 1 | 3 | 9 | 4 | 1 | ||||||||
| Ringlet | . | . | . | . | . | . | . | . | 2 | 2 | 1 | 6 | 1 | . | . | . | . | . | ||||||||