
| 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 | . | . | . | . | . | . | . | . | 5 | 13 | 25 | 15 | 15 | . | 1 | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | 1 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | 2 | 9 | 10 | 16 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | 1 | 3 | 4 | 9 | 6 | 2 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||
| Brimstone | 2 | 4 | 8 | 6 | 7 | 12 | 2 | . | . | . | . | 1 | 6 | . | 2 | 1 | . | . | . | . | ||||||
| Large White | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | 2 | . | . | . | . | . | ||||||
| Small White | . | . | . | . | . | . | . | . | . | . | 4 | 2 | 1 | . | 1 | 10 | 7 | 12 | 4 | . | ||||||
| Green-veined White | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Orange Tip | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | 1 | . | 3 | 1 | 4 | . | . | . | . | 2 | 1 | . | . | 1 | . | . | . | 3 | 3 | 12 | ||||||
| Small Blue | . | . | . | . | 1 | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | . | 2 | 1 | 3 | . | 3 | . | ||||||
| Common Blue | . | . | . | 1 | 18 | 31 | 21 | 3 | 4 | 2 | . | . | 12 | 22 | 42 | 36 | 18 | 8 | 8 | 8 | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 1 | 6 | 20 | 15 | 5 | 3 | 3 | . | . | ||||||
| Adonis Blue | . | . | . | . | 2 | 7 | . | . | . | . | . | . | . | . | 3 | 2 | 15 | 10 | 7 | . | ||||||
| Holly Blue | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Duke of Burgundy Fritillary | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Small Tortoiseshell | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | 2 | 2 | . | 2 | 1 | . | . | ||||||
| Peacock | 3 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | 1 | 19 | 28 | 34 | 6 | 2 | 2 | . | . | . | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | 14 | 26 | 37 | 17 | . | . | . | . | . | . | . | . | ||||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 2 | 12 | 11 | 4 | 1 | . | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | 1 | 7 | 8 | 17 | 30 | 22 | 73 | 155 | 201 | 232 | 100 | 100 | 60 | 39 | 17 | ||||||
| Small Heath | . | . | . | . | 1 | 12 | 22 | 20 | 37 | 40 | 31 | 23 | 5 | 6 | 13 | 9 | 45 | 46 | 33 | 7 | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 4 | 6 | 5 | . | . | . | . | . | . | . | . | . | ||||||