
| 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 | Ind | ||||||||||||||||||||||||||
| Large Skipper | 80 | . | . | . | . | . | . | . | 2 | . | . | 7 | 21 | 10 | 15 | 2 | 1 | . | . | . | . | . | . | . | |||
| Dingy Skipper | 2 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | 1 | . | . | . | . | . | . | . | |||
| Brimstone | 67 | 2 | 1 | 1 | 1 | 1 | 4 | 2 | 4 | 3 | 3 | 1 | . | . | . | . | 3 | 1 | 6 | 9 | 13 | 7 | 4 | . | |||
| Large White | 8 | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | 1 | . | . | 1 | . | 2 | 1 | . | . | |||
| Small White | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 1 | . | |||
| Green-veined White | 59 | . | . | . | . | . | 1 | 4 | 4 | 1 | 2 | 4 | 2 | . | . | . | 23 | 13 | 4 | 1 | . | . | . | . | |||
| Orange Tip | 4 | . | . | . | . | . | 1 | 2 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||
| Northern Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | |||
| Common Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||
| Holly Blue | NI | . | . | . | . | 1 | . | 1 | 2 | 5 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | 6 | . | . | . | . | . | . | . | . | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | 14 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 2 | 2 | 5 | 1 | . | 1 | 2 | . | |||
| Painted Lady | 102 | . | . | . | . | . | . | . | . | 3 | 5 | 11 | 5 | . | . | 1 | 19 | 13 | 32 | 3 | 7 | 1 | . | 1 | |||
| Small Tortoiseshell | 22 | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 2 | 9 | 4 | 3 | 1 | . | . | . | . | |||
| Peacock | 132 | 5 | 9 | 14 | 5 | 12 | 15 | 15 | 5 | 6 | . | . | . | . | . | . | 2 | 5 | 10 | 9 | 6 | 1 | 1 | . | |||
| Comma | 20 | 5 | 4 | . | 1 | 1 | 1 | 1 | 1 | . | . | . | . | . | . | . | 1 | 1 | . | . | 2 | . | . | . | |||
| Small Pearl-bordered Fritillary | 33 | . | . | . | . | . | . | . | . | . | 9 | 12 | 2 | 1 | 4 | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | 227 | . | . | . | . | . | . | 3 | 44 | 60 | 44 | 44 | 21 | 7 | . | . | . | . | . | . | . | . | . | . | |||
| High Brown Fritillary | 89 | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 21 | 21 | 3 | 3 | 1 | . | 1 | . | . | . | |||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 1 | . | . | . | . | . | . | . | |||
| Speckled Wood | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | |||
| Wall Brown | 5 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 3 | 1 | . | . | . | |||
| Meadow Brown | 162 | . | . | . | . | . | . | . | . | . | . | 2 | . | 7 | 24 | 37 | 19 | 13 | 10 | 1 | 2 | . | . | . | |||