
| 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 | ||||||||||||||||||||||||||
| Dingy Skipper | . | . | . | 7 | 9 | 8 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 3 | 3 | 4 | 2 | . | . | 1 | . | . | . | . | . | . | . | 5 | 4 | 4 | 9 | ||||||||
| Large White | . | . | . | . | 2 | 2 | 4 | . | . | 1 | . | . | 1 | 12 | 10 | 6 | 11 | 6 | ||||||||
| Small White | . | . | . | 1 | . | 1 | 2 | 1 | . | . | . | 2 | 2 | 4 | 6 | 12 | 13 | 5 | ||||||||
| Green-veined White | . | . | 14 | 51 | 61 | 53 | 6 | . | 5 | 6 | 23 | 144 | 85 | 174 | 188 | 138 | 128 | 66 | ||||||||
| Orange Tip | . | . | 16 | 21 | 11 | 17 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | . | . | . | ||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | ||||||||
| Northern Brown Argus | . | . | . | . | . | . | 1 | 1 | 2 | 7 | 1 | 1 | 1 | . | . | . | . | . | ||||||||
| Common Blue | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Holly Blue | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Duke of Burgundy Fritillary | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 2 | . | . | . | ||||||||
| Small Tortoiseshell | 17 | 27 | 15 | 5 | 2 | 3 | . | . | . | 4 | 8 | 30 | 19 | 23 | 30 | 17 | 8 | 2 | ||||||||
| Peacock | 5 | 9 | 6 | 10 | 3 | 4 | . | . | . | . | . | . | 3 | 6 | 24 | 31 | 27 | 9 | ||||||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | 9 | 1 | 4 | . | . | . | . | . | . | . | . | . | ||||||||
| Pearl-bordered Fritillary | . | . | . | 6 | 17 | 24 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 3 | 7 | 7 | . | 2 | 7 | . | . | . | ||||||||
| Wall Brown | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | 2 | 7 | 12 | 5 | ||||||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | 2 | . | 1 | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 11 | 16 | 61 | 60 | 68 | 33 | 37 | 12 | 2 | 4 | 1 | ||||||||
| Small Heath | . | . | . | 2 | 33 | 29 | 2 | . | . | 2 | . | . | . | . | . | . | . | . | ||||||||