
| 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 | 87 | . | . | . | . | . | . | . | . | . | . | . | 24 | 23 | 11 | 1 | . | . | 2 | . | . | . | . | ||||
| Large Skipper | 63 | . | . | . | . | . | . | . | 2 | 8 | 18.5 | 2 | 13 | 4 | 1 | . | 1 | . | . | . | . | . | . | ||||
| Brimstone | 143 | 16 | 16 | 9 | 5 | 5 | 4 | 6 | . | . | . | . | . | 1 | 16 | 9 | 12 | 18 | 3 | 1 | . | 1 | . | ||||
| Large White | 16 | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | 2 | 1 | 6 | 1 | . | 1 | . | . | ||||
| Small White | 71 | . | . | . | . | . | . | . | . | . | . | . | 3 | 13 | 6 | 9 | . | . | 24 | 4 | 1 | 1 | . | ||||
| Green-veined White | 21 | . | . | . | 6 | . | . | 1 | . | . | . | . | . | . | 5 | . | 1 | . | . | 1 | . | . | . | ||||
| Orange Tip | 11 | . | . | 2 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| White-letter Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| Common Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | ||||
| Holly Blue | 3 | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Duke of Burgundy Fritillary | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | 13 | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 1 | 3 | 1 | . | . | . | . | . | . | . | ||||
| Purple Emperor | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | 40 | 1 | 1 | . | . | . | . | 1 | 1 | . | 2 | . | . | 2 | 4 | . | 1 | . | 4 | 2 | 2 | 2 | 11 | ||||
| Small Tortoiseshell | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 3 | 1 | . | . | . | ||||
| Peacock | 42 | 8 | 1 | 1 | 3 | . | . | . | . | . | 0.5 | . | . | . | 2 | 7 | 8 | 1 | 2 | 1 | . | . | 1 | ||||
| Comma | 60 | 4 | 1 | 1 | 2 | . | . | . | . | . | . | . | 1 | 2 | 8 | 2 | 1 | 2 | . | 14 | 6 | 6 | 3 | ||||
| Small Pearl-bordered Fritillary | 29 | . | . | . | . | 1 | 9 | 6 | 5 | 10 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Pearl-bordered Fritillary | 52 | . | . | . | 5 | 11 | 2 | 15 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | 213 | . | . | . | . | . | . | . | . | . | 3 | 7 | 26 | 26 | 41 | 16 | 31 | 12 | 3 | . | . | . | . | ||||
| Marsh Fritillary | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | 174 | . | 1 | 2 | 6 | 10 | 3 | 6 | 8 | 13 | 9 | . | 1 | 5 | 2 | 4 | 9 | 15 | 11 | 29 | 13 | 5 | 1 | ||||
| Marbled White | 3 | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | 6 | 80 | 114 | 30 | 46 | 6 | . | . | . | . | . | ||||
| Meadow Brown | 119 | . | . | . | . | . | . | . | . | . | 5 | 1 | 24 | 14 | 29 | 6 | 6 | 2 | . | . | . | . | . | ||||
| Ringlet | 387 | . | . | . | . | . | . | . | . | . | 16.5 | 44 | 80 | 120 | 26 | 6 | . | . | . | . | . | . | . | ||||