
| 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 | . | . | . | . | . | 2 | 8 | 22 | 20 | 20 | 4 | 2 | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | . | 6 | 12 | 10 | 8 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | 2 | . | |||||
| Large White | . | 4 | . | 6 | 2 | 2 | 2 | . | . | . | 4 | . | 4 | 10 | 2 | 2 | . | . | . | . | . | |||||
| Small White | . | 4 | . | . | . | . | 2 | . | . | 2 | 4 | . | 2 | 2 | 8 | 2 | 2 | 4 | 2 | 2 | . | |||||
| Green-veined White | 2 | 12 | 12 | 32 | 18 | 4 | 6 | 6 | . | . | 4 | 14 | 36 | 56 | 34 | 8 | 4 | 8 | 4 | 4 | . | |||||
| Orange Tip | . | 10 | 12 | 26 | 16 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | |||||
| Northern Brown Argus | . | . | . | . | . | . | . | 16 | 12 | 30 | 18 | 22 | 6 | 2 | 4 | . | 2 | . | . | . | . | |||||
| Common Blue | . | . | . | . | . | 8 | 6 | 8 | 8 | 6 | 6 | . | . | 2 | 4 | 2 | . | 2 | . | 2 | . | |||||
| Holly Blue | . | . | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Duke of Burgundy Fritillary | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 4 | 8 | 6 | . | . | 4 | . | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 6 | . | 2 | . | . | 2 | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | 2 | 2 | 6 | . | 4 | 8 | 4 | . | . | 4 | 2 | 8 | 2 | |||||
| Peacock | 6 | 4 | . | 2 | . | . | . | . | . | . | . | . | 4 | 28 | 38 | 16 | 6 | 10 | 2 | . | 2 | |||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | 6 | 8 | 6 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Pearl-bordered Fritillary | . | . | . | 50 | 114 | 72 | 26 | 22 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | 50 | 62 | 68 | 54 | 38 | 26 | 8 | 2 | . | . | . | . | . | |||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | 4 | 4 | 6 | . | . | . | |||||
| Grayling | . | . | . | . | . | . | . | 2 | 32 | 50 | 84 | 64 | 44 | 28 | 6 | 4 | 4 | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 10 | 110 | 112 | 128 | 122 | 58 | 82 | 54 | 6 | . | . | . | . | . | |||||