
| 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 | . | 2 | . | 1 | 1 | . | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | . | 8 | 12 | 7 | 6 | 3 | . | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 2 | . | . | 1 | 1 | . | |||
| Brimstone | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | 1 | . | . | . | . | . | . | |||
| Large White | . | . | . | . | . | . | 1 | 2 | . | 3 | . | . | . | 1 | 1 | 4 | 4 | 4 | 2 | . | . | 4 | . | |||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 8 | 3 | 1 | . | . | . | . | . | |||
| Green-veined White | . | . | . | 1 | . | . | 3 | . | 3 | 1 | . | . | . | . | 1 | . | 1 | 1 | 1 | 2 | . | . | . | |||
| Green Hairstreak | . | . | . | . | 2 | 2 | 5 | 15 | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | |||
| Silver-studded Blue | . | . | . | . | . | . | . | . | . | . | . | 4 | 16 | 19 | 9 | . | 4 | . | . | . | . | . | . | |||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | . | 1 | . | . | . | . | |||
| Common Blue | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | 2 | 1 | 13 | 2 | 8 | 2 | 3 | . | 1 | . | |||
| Holly Blue | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | 2 | 6 | . | . | . | . | . | . | |||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 7 | 5 | . | 1 | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 3 | 2 | . | . | 1 | . | 1 | 1 | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | |||
| Small Tortoiseshell | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||
| Peacock | 2 | 3 | 3 | 1 | . | . | . | 1 | . | . | . | . | . | . | 2 | 9 | 6 | . | . | . | . | . | . | |||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 3 | 2 | 5 | . | . | . | . | . | . | |||
| Speckled Wood | . | . | 2 | 6 | 2 | 6 | . | . | 2 | 10 | 4 | 4 | 2 | . | 5 | 10 | 4 | 18 | 27 | 38 | 26 | 5 | 2 | |||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 11 | 20 | 14 | 18 | 9 | 10 | 9 | 2 | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 79 | 96 | 130 | 75 | 35 | 16 | 2 | 1 | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 8 | 9 | 10 | 6 | 1 | . | . | . | . | . | |||