
| 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 | ||||||||||||||||||||||||||
| Small Skipper | 62 | . | . | . | . | . | . | 1 | . | . | 1 | 2 | 16 | 10 | 19 | 11 | 2 | . | . | . | . | . | . | ||||
| Large Skipper | 20 | . | . | . | . | . | . | . | . | 5 | 2 | 3 | 6 | 4 | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | 5 | . | . | . | 1 | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 27 | 2 | 4 | 2 | . | . | 7 | 1 | . | . | . | . | 2 | . | . | 2 | 1 | . | . | 2 | . | 1 | . | ||||
| Large White | 19 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 2 | 1 | 8 | 2 | 1 | 3 | . | 1 | ||||
| Small White | 33 | . | . | . | . | . | . | 1 | . | . | . | 1 | 1 | 1 | 4 | 5 | 5 | . | 7 | 5 | . | 3 | . | ||||
| Green-veined White | 5 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | 1 | . | . | . | ||||
| Orange Tip | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Common Blue | 4 | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Holly Blue | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Duke of Burgundy Fritillary | 2 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | 4 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | 1 | . | . | . | ||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Small Tortoiseshell | 7 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 2 | . | . | ||||
| Peacock | 17 | 2 | 4 | 1 | . | . | . | . | . | . | . | . | 3 | . | . | 6 | 1 | . | . | . | . | . | . | ||||
| Small Pearl-bordered Fritillary | 92 | . | . | . | . | . | 28 | 35 | 15 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Pearl-bordered Fritillary | 60 | . | 2 | 15 | 19 | . | 5 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | 18 | . | . | . | . | . | . | . | . | 1 | 4 | 3 | . | 10 | . | . | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | 34 | . | . | . | . | . | . | . | . | 2 | 13 | 9 | 5 | 2 | 3 | . | . | . | . | . | . | . | . | ||||
| Marsh Fritillary | 2 | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | 24 | . | . | . | . | . | 1 | 3 | 1 | 3 | . | 1 | 1 | 2 | 1 | . | 1 | 3 | 5 | . | . | . | 1 | ||||
| Marbled White | 206 | . | . | . | . | . | . | . | . | . | 48 | 74 | 40 | 35 | 9 | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 268 | . | . | . | . | . | . | . | . | . | . | . | 28 | 57 | 84 | 52 | 40 | 6 | 1 | . | . | . | . | ||||
| Meadow Brown | 117 | . | . | . | . | . | . | . | . | . | 26 | 11 | 28 | 3 | 20 | 17 | 3 | 9 | . | . | . | . | . | ||||
| Ringlet | 172 | . | . | . | . | . | . | . | . | . | 57 | 59 | 31 | 15 | 8 | 2 | . | . | . | . | . | . | . | ||||