
| 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 | 1 | 8 | 5 | 2 | 2 | . | . | . | . | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | 4 | 12 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | 2 | 5 | 8 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | 1 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Large White | . | . | . | 1 | . | 1 | . | . | . | . | . | . | 2 | . | . | 1 | . | . | . | . | . | . | ||||
| Small White | . | . | . | . | 1 | 2 | . | . | 1 | 1 | . | . | 1 | 2 | . | . | 5 | 2 | 1 | . | . | . | ||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | . | . | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| Brown Argus | . | . | . | 8 | 17 | 4 | 7 | 3 | . | . | . | . | . | . | . | 12 | 1 | . | . | . | . | . | ||||
| Common Blue | . | . | . | 4 | 7 | 12 | 11 | . | . | . | . | . | 1 | 3 | 5 | 23 | 12 | 7 | 3 | 8 | . | . | ||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | 12 | 32 | 69 | 97 | 48 | 25 | 13 | 5 | . | . | ||||
| Adonis Blue | . | . | . | . | 1 | 2 | 10 | . | . | . | . | . | . | . | . | 4 | 21 | 19 | 1 | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | ||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | 5 | 2 | . | . | . | . | 1 | 1 | . | . | . | . | . | ||||
| Peacock | 1 | 3 | 2 | . | . | . | . | . | . | . | . | 3 | 3 | . | . | . | . | . | 1 | . | . | 1 | ||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 2 | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 6 | 4 | 2 | . | . | . | . | . | . | . | ||||
| Glanville Fritillary | . | . | . | . | 2 | 6 | 5 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | ||||
| Wall Brown | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | 4 | 1 | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 29 | 52 | 12 | 12 | 1 | . | . | . | . | . | . | . | ||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 2 | . | 1 | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 3 | 29 | 36 | 35 | 50 | 19 | 2 | . | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 25 | 74 | 57 | 45 | 64 | 73 | 47 | 52 | 26 | 18 | 7 | 5 | . | . | ||||
| Small Heath | . | . | . | . | 5 | 4 | 1 | 18 | 21 | 14 | 4 | 4 | 2 | . | 2 | 8 | 8 | 17 | 18 | 12 | 5 | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||