
| 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 | NI | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 2 | 4 | . | . | 1 | . | . | . | . | . | |||
| Large Skipper | 27 | . | . | . | . | . | . | . | . | . | . | 5 | 2 | . | 3 | 5 | 4 | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 6 | . | . | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Wood White | 6 | . | . | . | . | . | 2 | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 89 | 22 | 20 | 14 | 2 | 3 | 6 | 2 | 1 | . | . | . | . | . | . | . | . | 3 | 5 | 3 | 5 | . | . | 1 | |||
| Large White | 65 | . | . | . | 2 | . | 6 | 2 | 7 | 9 | 3 | 4 | . | . | 3 | 2 | 4 | . | 5 | 2 | . | 4 | . | . | |||
| Small White | 194 | . | . | . | 10 | 9 | 6 | 22 | 10 | 2 | 1 | 2 | 1 | . | 1 | 13 | 32 | 9 | 11 | 10 | 7 | 4 | 1 | 2 | |||
| Green-veined White | 32 | . | . | 3 | 2 | . | . | 1 | 1 | . | 1 | . | . | . | . | 3 | 8 | 1 | . | 3 | . | . | . | 1 | |||
| Orange Tip | 65 | . | . | 20 | 11 | 15 | 12 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||
| Small Copper | 4 | . | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Common Blue | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||
| White Admiral | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 1 | . | . | . | . | . | . | |||
| Purple Emperor | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | |||
| Red Admiral | 9 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 2 | . | . | . | 2 | 2 | 2 | |||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||
| Small Tortoiseshell | 12 | 1 | 1 | . | . | . | . | . | . | . | . | 1 | . | . | 1 | 2 | . | . | . | . | 1 | 1 | 1 | 1 | |||
| Peacock | 33 | . | 2 | 6 | . | 4 | 2 | 3 | . | 2 | . | . | . | . | . | . | 1 | 3 | 3 | 2 | . | . | . | 1 | |||
| Comma | 16 | . | 1 | . | . | . | 1 | . | 1 | . | 1 | . | . | . | 2 | 1 | 2 | 1 | . | . | . | . | . | 2 | |||
| Pearl-bordered Fritillary | 21 | . | . | . | 5 | . | 1 | 5 | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | 2 | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 51 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 7 | 14 | 6 | 8 | . | 3 | . | . | . | . | |||
| Speckled Wood | 155 | . | . | 4 | 4 | 2 | 6 | 6 | 5 | 12 | 3 | 9 | 1 | 4 | 3 | 5 | 2 | 4 | 16 | 15 | 10 | 11 | 13 | 4 | |||
| Wall Brown | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | 3 | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 127 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 13 | 33 | 29 | 9 | 15 | 2 | . | . | . | |||
| Meadow Brown | 213 | . | . | . | . | . | . | . | . | . | 1 | 12 | 8 | 17 | 31 | 35 | 43 | 3 | 8 | 8 | 1 | . | . | . | |||
| Small Heath | 5 | . | . | . | . | . | . | . | 1 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Ringlet | 69 | . | . | . | . | . | . | . | . | . | . | 2 | . | 6 | 14 | 31 | . | . | . | . | . | . | . | . | |||