
| 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 | ||||||||||||||||||||||||||
| Large Skipper | . | . | . | . | . | . | . | 16 | 28 | 20 | 22 | 2 | 6 | 2 | 2 | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | . | . | 4 | 24 | 10 | 4 | 8 | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 2 | . | . | 2 | . | ||||||
| Brimstone | 2 | 2 | 2 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | . | ||||||
| Large White | . | . | . | . | 2 | 2 | 4 | 4 | 4 | . | 2 | . | 4 | . | 2 | 2 | . | . | 6 | . | ||||||
| Small White | . | . | 2 | . | . | . | . | 4 | . | . | . | . | 4 | . | . | 8 | 2 | . | . | . | ||||||
| Green-veined White | . | . | . | . | 6 | 26 | 6 | 2 | . | 2 | . | 2 | 4 | 6 | 16 | 4 | 12 | . | . | . | ||||||
| Orange Tip | . | . | . | . | 2 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 4 | . | 4 | . | . | . | ||||||
| Northern Brown Argus | . | . | . | . | . | . | . | 2 | 16 | 24 | 64 | 32 | 72 | 46 | 4 | 6 | 2 | . | 2 | . | ||||||
| Common Blue | . | . | . | . | . | . | . | . | 2 | 12 | 4 | 2 | . | . | . | . | . | . | . | . | ||||||
| Holly Blue | . | . | 2 | 2 | 6 | 2 | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | ||||||
| Duke of Burgundy Fritillary | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | 2 | . | . | . | 2 | . | . | 2 | . | 2 | 8 | 4 | 8 | . | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | ||||||
| Small Tortoiseshell | 2 | . | 2 | . | . | . | . | . | . | . | . | 6 | 6 | 6 | 12 | 6 | 4 | . | 2 | . | ||||||
| Peacock | 28 | 10 | 24 | 16 | 6 | 6 | 2 | . | . | . | . | . | . | 2 | 14 | 26 | 42 | 10 | 6 | . | ||||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | 2 | 4 | 2 | . | . | . | . | . | . | . | . | . | ||||||
| Pearl-bordered Fritillary | . | . | . | . | 2 | 34 | 116 | 64 | 48 | 10 | . | . | . | . | . | . | . | . | . | . | ||||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 4 | 50 | 62 | 50 | 38 | 24 | 12 | 2 | 2 | . | . | ||||||
| Wall Brown | . | . | . | . | . | 2 | 4 | 6 | . | . | . | . | . | . | . | 4 | 10 | 4 | 20 | 2 | ||||||
| Grayling | . | . | . | . | . | . | . | . | . | 4 | 16 | 12 | 34 | 32 | 24 | 18 | 10 | 2 | 2 | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 4 | 8 | 56 | 152 | 132 | 100 | 82 | 44 | 42 | 18 | 4 | 2 | . | ||||||
| Small Heath | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||