
| 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 | 123 | . | . | . | . | . | . | . | . | . | . | . | . | 23 | 43 | 18 | 19 | 13 | 7 | . | . | . | . | . | |||
| Large Skipper | 35 | . | . | . | . | . | . | . | . | . | 1 | . | 9 | 12 | 8 | 4 | 1 | . | . | . | . | . | . | . | |||
| Dingy Skipper | 2 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 19 | . | . | . | . | . | 1 | 6 | 5 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 3 | 1 | . | . | . | . | |||
| Brimstone | 115 | 11 | 12 | 12 | 11 | 11 | 7 | 7 | 11 | 1 | 1 | . | . | . | . | 2 | 9 | 2 | 4 | 4 | 1 | 2 | 1 | 4 | |||
| Large White | 25 | . | . | . | 1 | . | 1 | 2 | 5 | 3 | 2 | . | . | . | . | 4 | 2 | . | 1 | 1 | 1 | 1 | . | . | |||
| Small White | 26 | . | . | . | . | . | 2 | . | . | 2 | 1 | . | . | . | 1 | 2 | 3 | 1 | 1 | . | 4 | 5 | . | . | |||
| Green-veined White | 13 | 1 | . | . | 2 | 1 | . | 2 | 1 | . | . | . | . | . | . | 2 | 1 | 1 | 2 | . | . | . | . | . | |||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | |||
| Small Copper | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | 2 | |||
| Brown Argus | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | 1 | . | . | |||
| Common Blue | 50 | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | 2 | 3 | 14 | 13 | 7 | 4 | 3 | . | . | |||
| Holly Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | |||
| White Admiral | 7 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 3 | . | . | . | . | . | . | . | . | |||
| Purple Emperor | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Red Admiral | 5 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 1 | . | . | |||
| Painted Lady | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 1 | . | . | . | . | . | . | |||
| Small Tortoiseshell | 18 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 4 | . | . | |||
| Peacock | 71 | 11 | 1 | 8 | 5 | 11 | 4 | 1 | 1 | . | . | . | . | . | . | 7 | 8 | 2 | 5 | 1 | 3 | 1 | 1 | . | |||
| Comma | 22 | 3 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 7 | 1 | 1 | |||
| Small Pearl-bordered Fritillary | NI | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | 2 | 1 | . | . | . | . | . | |||
| Marsh Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Speckled Wood | 122 | . | . | 1 | . | 1 | 2 | . | 1 | 1 | 1 | 3 | 4 | . | 2 | 2 | 4 | 6 | 9 | 17 | 24 | 29 | . | . | |||
| Wall Brown | 17 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 7 | 4 | 3 | 1 | . | . | . | |||
| Marbled White | 39 | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 14 | 11 | 9 | . | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 77 | . | . | . | . | . | . | . | . | . | . | . | . | . | 11 | 24 | 24 | 9 | 9 | . | . | . | . | . | |||
| Meadow Brown | 115 | . | . | . | . | . | . | . | . | . | . | 4 | 18 | 30 | 28 | 19 | 8 | 4 | 3 | 1 | . | . | . | . | |||
| Small Heath | 30 | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | 3 | 3 | 1 | 1 | 2 | 8 | 2 | 3 | 2 | . | . | |||
| Ringlet | 21 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 14 | 3 | 1 | . | . | . | . | . | . | . | |||