
| 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 | . | . | . | . | . | . | . | . | . | . | . | 3 | 87 | 74 | 15 | 2 | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | . | 1 | 7 | 24 | 30 | 34 | 24 | 3 | 1 | 1 | . | . | . | ||||||
| Dingy Skipper | . | . | . | . | 5 | 13 | 17 | 16 | 9 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 3 | 1 | . | . | ||||||
| Brimstone | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Large White | . | . | . | . | . | . | . | . | 1 | 4 | . | . | 1 | . | 3 | 1 | . | 1 | . | . | ||||||
| Small White | 1 | 1 | 4 | 2 | 4 | 2 | 5 | 1 | 6 | 1 | . | 1 | 2 | 1 | 22 | 9 | 5 | 3 | 1 | 3 | ||||||
| Green-veined White | . | . | . | . | 1 | 2 | 3 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Orange Tip | . | . | 1 | . | 1 | 3 | 5 | 1 | . | 4 | 2 | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | . | 2 | 1 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Small Blue | . | . | . | . | . | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | . | . | . | . | 1 | 1 | 6 | 1 | . | . | . | 5 | 14 | 15 | 10 | 1 | 3 | ||||||
| Common Blue | . | . | . | . | . | . | 2 | 12 | 38 | 37 | 7 | . | 1 | 1 | 48 | 78 | 47 | 33 | 30 | 37 | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Adonis Blue | . | . | . | . | . | . | 11 | 12 | 17 | 11 | . | . | . | . | . | 2 | 30 | 49 | 30 | 5 | ||||||
| Holly Blue | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | 3 | 7 | 3 | 2 | 1 | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | 3 | 1 | . | . | 3 | 4 | 3 | 1 | . | . | . | ||||||
| Painted Lady | . | . | . | . | . | 1 | . | . | 6 | 3 | . | . | . | 1 | 15 | 9 | 7 | . | 1 | . | ||||||
| Small Tortoiseshell | 4 | 11 | 1 | 1 | 2 | . | . | . | . | . | 1 | 6 | 3 | . | 7 | . | . | . | 1 | . | ||||||
| Peacock | 13 | 7 | . | 3 | . | . | . | . | . | . | . | . | . | . | 1 | 4 | . | 4 | . | . | ||||||
| Comma | . | 3 | . | . | . | 1 | . | 1 | . | 1 | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Speckled Wood | . | . | 5 | 3 | 3 | 2 | . | . | 2 | 8 | . | . | 1 | . | 9 | 11 | 6 | 6 | 4 | 2 | ||||||
| Wall Brown | . | . | . | . | . | . | 2 | 9 | . | . | . | . | . | . | . | 22 | 13 | 1 | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 40 | 185 | 291 | 58 | 10 | 1 | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 21 | 46 | 69 | 35 | 7 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 3 | 27 | 75 | 147 | 159 | 129 | 46 | 13 | 2 | 5 | . | ||||||
| Small Heath | . | . | . | . | 3 | 4 | 9 | 15 | 37 | 68 | 30 | 18 | 16 | 17 | 7 | 62 | 53 | 57 | 13 | 27 | ||||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | 4 | 11 | 21 | 7 | . | . | . | . | . | ||||||