
| 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 | ||||||||||||||||||||||||||
| Small Skipper | . | . | . | . | . | . | . | . | . | . | 10 | 2 | 36 | 86 | 90 | 28 | . | . | . | 2 | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | 4 | 20 | 56 | 18 | 2 | 2 | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 26 | 6 | 10 | 22 | 4 | 16 | 4 | . | . | . | . | . | . | 16 | 40 | 36 | . | 16 | 54 | 44 | 6 | . | ||||
| Large White | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | 6 | 18 | 14 | . | 2 | . | . | . | . | ||||
| Small White | . | . | . | . | . | . | 2 | . | . | . | 6 | 2 | . | . | 12 | 24 | 6 | 16 | 28 | 18 | 4 | . | ||||
| Green-veined White | . | . | . | . | 2 | . | . | . | . | . | . | . | 8 | 20 | 14 | . | . | . | 14 | 6 | . | . | ||||
| Orange Tip | 2 | 2 | 2 | 16 | . | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 12 | . | 2 | . | . | . | . | ||||
| Duke of Burgundy Fritillary | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | 2 | . | 2 | . | . | . | . | . | . | ||||
| Purple Emperor | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | 2 | . | . | . | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 4 | 2 | . | 6 | . | . | . | 2 | 8 | 12 | . | 2 | ||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 4 | 2 | . | . | ||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 2 | . | . | ||||
| Peacock | 16 | 10 | 6 | 16 | . | . | . | . | . | . | 2 | . | . | 10 | 84 | 70 | 4 | 4 | 4 | 4 | 2 | . | ||||
| Comma | 2 | 6 | 4 | . | . | . | . | . | . | . | 4 | 6 | 2 | . | . | . | . | . | 2 | 10 | 2 | 10 | ||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | 14 | . | 16 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Pearl-bordered Fritillary | . | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 2 | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 56 | 40 | 40 | 32 | 60 | 4 | 6 | 10 | . | . | . | ||||
| Speckled Wood | . | 6 | 2 | 8 | 4 | 6 | 38 | 10 | 24 | 20 | 2 | . | . | 10 | 14 | 46 | 40 | 66 | 74 | 68 | 22 | 2 | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 52 | 50 | 74 | 34 | 14 | 4 | . | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 36 | 58 | 236 | 290 | 192 | 22 | 4 | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | 44 | 202 | 58 | 122 | 100 | 32 | 6 | 10 | . | . | . | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | 6 | 226 | 234 | 492 | 202 | 50 | 22 | . | . | . | . | . | . | ||||