
| 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 | . | . | . | . | . | . | . | . | . | . | 12 | 4 | 8 | 12 | 21 | 14 | 1 | . | . | . | . | . | . | |||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | 3 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | 1 | 12 | 27 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | 6 | 7 | 11 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 4 | . | 1 | . | . | . | |||
| Brimstone | . | 4 | 7 | 9 | 6 | 6 | 4 | 4 | 4 | . | 1 | . | 2 | 4 | 18 | 5 | 8 | 1 | 3 | 9 | . | . | . | |||
| Large White | . | . | . | . | . | 1 | . | . | . | . | . | 5 | 2 | 4 | 25 | 22 | 6 | 1 | 2 | . | . | . | . | |||
| Small White | . | . | . | . | . | . | . | . | 1 | . | 1 | 5 | 5 | 6 | 13 | 11 | 2 | 7 | 5 | 2 | 5 | . | . | |||
| Green-veined White | . | . | . | . | . | 3 | 2 | 1 | . | . | . | . | . | 1 | 2 | 2 | . | . | . | 4 | . | . | . | |||
| Green Hairstreak | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | . | . | . | 1 | |||
| Small Blue | . | . | . | . | 1 | 35 | 11 | 12 | 7 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 7 | 4 | 2 | 2 | . | . | . | |||
| Common Blue | . | . | . | . | . | 3 | 21 | 23 | 17 | 6 | 1 | . | . | 3 | 19 | 52 | 39 | 7 | 11 | 17 | 8 | 1 | . | |||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 14 | 30 | 5 | 5 | 7 | . | . | . | |||
| Adonis Blue | . | . | . | . | . | 4 | 21 | 20 | 13 | . | . | . | . | . | . | 5 | 11 | 4 | 10 | 23 | 7 | 4 | 1 | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Painted Lady | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | |||
| Small Tortoiseshell | . | 1 | 1 | . | . | . | . | . | . | . | 1 | 2 | 3 | 3 | . | . | . | . | 3 | 1 | . | . | . | |||
| Peacock | . | 1 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 10 | 9 | 6 | 10 | 9 | 10 | 11 | . | . | . | . | . | . | . | |||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | . | . | |||
| Marbled White | . | . | . | . | . | . | . | . | . | 6 | 27 | 11 | 7 | 5 | 1 | . | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 12 | 12 | 7 | 4 | . | . | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | 2 | 10 | 22 | 7 | 15 | 53 | 223 | 744 | 629 | 227 | 152 | 146 | 77 | 20 | 5 | |||
| Small Heath | . | . | . | . | . | 2 | 7 | 34 | 57 | 82 | 60 | 23 | 29 | 15 | 9 | 9 | 5 | 5 | 9 | 12 | 11 | 2 | . | |||
| Ringlet | . | . | . | . | . | . | . | . | . | 3 | 16 | 4 | 8 | . | 2 | . | . | . | . | . | . | . | . | |||