
| 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 | . | . | . | . | . | . | . | . | . | . | . | 34 | 6 | 10 | . | . | . | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | 8 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 5 | 2 | 3 | 1 | . | 1 | |||||
| Brimstone | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Large White | . | . | . | 9 | 2 | . | . | . | . | . | 1 | . | 3 | 4 | . | . | . | . | . | . | 1 | |||||
| Small White | . | . | 2 | 1 | . | 1 | . | . | . | . | . | 8 | 8 | 5 | 7 | 4 | 30 | 18 | 11 | 5 | . | |||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | |||||
| Small Copper | . | 1 | 4 | 4 | 1 | . | . | . | . | 1 | 5 | 17 | 9 | . | 2 | 1 | 3 | 2 | 2 | 2 | 5 | |||||
| Small Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Common Blue | . | . | . | 17 | 15 | 5 | 4 | 1 | . | . | . | . | 2 | 13 | 16 | 20 | 18 | 5 | . | . | 1 | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 165 | 235 | 297 | 158 | 91 | 19 | 2 | . | . | . | |||||
| Adonis Blue | . | . | . | 5 | 2 | 4 | 3 | . | . | . | . | . | . | . | . | 4 | 7 | 4 | 8 | 2 | . | |||||
| Holly Blue | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | 1 | 1 | . | . | 1 | . | 1 | |||||
| Painted Lady | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | |||||
| Small Tortoiseshell | . | . | 1 | . | . | . | . | . | . | . | . | 3 | . | 1 | 1 | 1 | . | 1 | . | . | . | |||||
| Peacock | 1 | 4 | 1 | . | . | . | . | . | . | . | . | 1 | 3 | . | 1 | . | . | . | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Wall Brown | . | . | 2 | 2 | . | . | . | . | . | . | . | . | 2 | . | 23 | . | . | . | . | . | 2 | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | 4 | 11 | 21 | 2 | 3 | . | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 6 | 4 | . | . | . | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | 2 | . | 2 | 9 | 14 | 57 | 102 | 104 | 182 | 127 | 91 | 30 | 39 | 17 | 8 | |||||
| Small Heath | . | . | 3 | 15 | 15 | 31 | 6 | 5 | 15 | 26 | . | 19 | 8 | 22 | 19 | 30 | 60 | 73 | 60 | 29 | 9 | |||||