
| 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 | 12 | . | . | . | . | . | . | . | . | 1 | 1 | 3 | 5 | . | 2 | . | . | . | . | . | . | ||||||
| Dingy Skipper | 7 | . | . | . | . | . | 3 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 80 | 2 | 1 | 7 | 1 | 5 | 5 | 3 | 5 | 3 | 1 | . | . | . | . | 3 | 3 | 6 | 17 | 1 | . | ||||||
| Large White | 10 | . | . | 1 | . | 1 | 1 | 1 | . | . | . | . | . | 3 | . | 1 | 1 | . | . | . | . | ||||||
| Small White | 14 | . | . | . | . | . | 1 | 2 | . | . | . | . | . | 1 | 3 | 3 | 1 | 1 | 1 | . | . | ||||||
| Green-veined White | 34 | . | . | . | 1 | 5 | 3 | 1 | . | . | . | . | 3 | . | 3 | 2 | 2 | . | 8 | . | 1 | ||||||
| Orange Tip | 9 | . | . | 1 | 1 | 4 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | 4 | . | . | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Northern Brown Argus | 65 | . | . | . | . | . | . | . | . | 2 | 6 | 21 | 12 | 6 | 7 | 5 | 2 | 1 | 1 | . | . | ||||||
| Common Blue | 130 | . | . | . | . | . | . | . | . | . | 2 | 13 | 21 | 28 | 21 | 14 | 11 | 3 | 5 | 1 | 1 | ||||||
| Holly Blue | 12 | . | 1 | 1 | 1 | 5 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Duke of Burgundy Fritillary | 27 | . | . | . | 3 | 10 | 11 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 3 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | ||||||
| Painted Lady | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||
| Small Tortoiseshell | 6 | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | ||||||
| Peacock | 237 | 7 | 4 | 4 | 2 | . | 1 | . | 1 | . | . | . | . | . | . | 4 | 13 | 70 | 50 | 1 | . | ||||||
| Comma | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Small Pearl-bordered Fritillary | 39 | . | . | . | . | 1 | . | 1 | 5 | 7 | 6 | 8 | 5 | 5 | 1 | . | . | . | . | . | . | ||||||
| Pearl-bordered Fritillary | 37 | . | . | . | . | 9 | 16 | 8 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| High Brown Fritillary | 130 | . | . | . | . | . | . | . | . | . | . | 2 | 16 | 22 | 30 | 20 | 17 | 7 | 3 | . | . | ||||||
| Dark Green Fritillary | 35 | . | . | . | . | . | . | . | . | . | 1 | 5 | 12 | 2 | 4 | 4 | 3 | 2 | . | . | . | ||||||
| Silver-washed Fritillary | 20 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 3 | 6 | . | 1 | 1 | 1 | ||||||
| Speckled Wood | 3 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Wall Brown | 10 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 1 | ||||||
| Grayling | 101 | . | . | . | . | . | . | . | . | . | . | . | . | 16 | 20 | 25 | 19 | 7 | 1 | . | . | ||||||
| Meadow Brown | 245 | . | . | . | . | . | . | . | . | . | 3 | 4 | 26 | 42 | 52 | 34 | 42 | 10 | 4 | . | . | ||||||
| Small Heath | 55 | . | . | . | . | . | . | . | 1 | 2 | 3 | . | 8 | 10 | 7 | 6 | 8 | 2 | 1 | 1 | . | ||||||