
| 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 | 2 | 2 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | 2 | 3 | 6 | 3 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 5 | 7 | 14 | 6 | 11 | 6 | 2 | 6 | 4 | 1 | . | . | . | . | . | 2 | 11 | 13 | 12 | 13 | 14 | 1 | . | |||
| Large White | . | . | . | . | . | 2 | 2 | . | 2 | 2 | . | . | . | 4 | . | 4 | 6 | 3 | 1 | 3 | . | . | . | |||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 4 | 4 | 2 | 2 | . | . | . | . | |||
| Green-veined White | . | 1 | 4 | 9 | 38 | 12 | 19 | 18 | 11 | 6 | 1 | 2 | 8 | 8 | 31 | 74 | 48 | 15 | 14 | 18 | 20 | . | . | |||
| Orange Tip | . | 2 | 5 | 16 | 4 | 14 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | 5 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||
| Northern Brown Argus | . | . | . | . | . | . | . | . | 8 | 8 | 8 | 8 | 5 | 5 | 3 | 5 | . | . | . | . | . | . | . | |||
| Common Blue | . | . | . | . | 1 | 1 | 3 | . | 1 | 3 | 1 | 6 | . | 3 | . | . | 2 | . | . | 2 | . | . | . | |||
| Holly Blue | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | 1 | . | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | 1 | 2 | . | 3 | . | 3 | 5 | . | 2 | 1 | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||
| Small Tortoiseshell | 4 | 4 | 9 | 20 | 13 | 3 | 3 | . | 1 | . | . | . | . | 2 | 33 | 57 | 15 | 7 | 1 | 1 | . | . | 2 | |||
| Peacock | 18 | 38 | 44 | 23 | 38 | 19 | 3 | 2 | 2 | 3 | . | 1 | . | . | . | 9 | 51 | 80 | 80 | 27 | 21 | 2 | . | |||
| Comma | . | 2 | 1 | 1 | . | 1 | . | . | . | . | . | . | 1 | 1 | 4 | 11 | 10 | 9 | 5 | 5 | 2 | . | . | |||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | 9 | 7 | 3 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | . | . | . | . | 10 | 17 | 9 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 2 | 19 | 27 | 50 | 22 | 18 | 8 | 8 | . | . | . | . | . | . | |||
| Speckled Wood | . | . | . | . | 3 | 1 | . | 1 | . | . | . | . | 4 | 1 | . | . | 5 | 6 | 8 | 4 | 3 | 2 | 1 | |||
| Wall Brown | . | . | . | . | 5 | 6 | 8 | 4 | 1 | . | . | . | . | . | . | 1 | 2 | 11 | 8 | 18 | 8 | . | . | |||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | 3 | 17 | 45 | 78 | 119 | 89 | 66 | 33 | 45 | 16 | 2 | 3 | . | . | . | |||
| Small Heath | . | . | . | . | 40 | 62 | 26 | 25 | 5 | 3 | . | 4 | 1 | . | . | . | . | . | . | . | . | . | . | |||