
| 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 | . | . | . | . | . | . | . | 96 | 110 | 56 | 62 | 46 | 22 | 4 | 14 | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | 6 | 2 | 12 | 2 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 2 | 2 | . | 2 | . | . | . | 2 | . | . | . | . | . | . | 2 | . | . | . | 2 | 2 | . | 8 | 2 | |||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 2 | 2 | . | . | . | . | |||
| Small White | . | . | 2 | . | . | 2 | . | 4 | . | 2 | . | . | . | . | . | . | 2 | 2 | 2 | 2 | . | . | . | |||
| Green-veined White | . | 4 | 6 | 6 | 6 | 8 | 8 | . | . | . | . | . | 8 | 22 | 22 | 34 | 12 | 14 | 6 | 8 | 2 | . | 2 | |||
| Orange Tip | . | 2 | 8 | 12 | 2 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||
| Northern Brown Argus | . | . | . | . | . | . | . | 2 | 4 | 2 | 6 | 18 | 10 | 12 | 8 | 6 | 2 | . | . | . | . | . | . | |||
| Common Blue | . | . | . | . | . | . | . | 8 | 8 | 8 | 2 | . | . | . | . | . | . | 8 | 46 | 22 | 4 | 8 | 2 | |||
| Holly Blue | . | 14 | 14 | 2 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 8 | 6 | 4 | . | . | . | |||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | 4 | 2 | . | . | 2 | 2 | . | . | |||
| Peacock | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | |||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | . | . | . | 6 | 52 | 134 | 204 | 60 | 44 | 2 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 4 | 12 | 48 | 76 | 44 | 28 | 24 | 18 | 2 | . | . | . | . | . | |||
| Grayling | . | . | . | . | . | . | . | . | . | . | 2 | 26 | 18 | 26 | 26 | 18 | 10 | 2 | . | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 6 | 40 | 78 | 86 | 98 | 50 | 50 | 20 | 22 | 16 | 2 | . | . | . | |||