
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 7 | 8 | 7 | . | . | . | . | . | . | . | |||
| Large Skipper | 76 | . | . | . | . | . | . | . | . | 1 | 1 | 6 | 8 | 25 | 5 | 18 | 11 | 1 | . | . | . | . | . | . | |||
| Grizzled Skipper | 2 | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 99 | 18 | . | 10 | 6 | 4 | 4 | 1 | 3 | 1 | . | . | . | . | . | 1 | . | 1 | 4 | 19 | 4 | 13 | 2 | 4 | |||
| Large White | 26 | . | . | . | . | . | . | . | . | 1 | . | . | 1 | 1 | 1 | . | 7 | 2 | 8 | 4 | 1 | . | . | . | |||
| Small White | 38 | . | . | . | 3 | . | 1 | 1 | . | . | 1 | . | . | . | . | 1 | 4 | 2 | 7 | 8 | 4 | 5 | . | . | |||
| Green-veined White | 136 | . | . | . | . | 6 | 8 | 3 | 3 | 4 | 2 | 1 | 3 | 4 | 9 | 9 | 19 | 12 | 23 | 11 | 10 | 1 | 1 | . | |||
| Orange Tip | 87 | 1 | 14 | 23 | 26 | 10 | 3 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||
| Small Copper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||
| Common Blue | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Holly Blue | 10 | . | . | . | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | |||
| White Admiral | 6 | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 3 | . | . | . | . | . | . | . | . | . | |||
| Purple Emperor | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | 15 | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | 2 | 1 | . | . | 3 | 2 | 1 | 1 | . | . | 1 | |||
| Painted Lady | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Tortoiseshell | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | 1 | . | 1 | 1 | |||
| Peacock | 40 | 1 | 1 | 6 | 4 | . | 1 | . | 1 | . | . | 1 | . | . | 1 | . | 1 | 8 | 10 | 1 | 2 | 1 | . | . | |||
| Comma | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | 1 | 1 | . | . | . | . | . | |||
| Pearl-bordered Fritillary | 16 | . | . | . | . | 1 | 5 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | 4 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | 1 | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 31 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 6 | 13 | 4 | 3 | . | 2 | . | . | . | . | . | |||
| Speckled Wood | 84 | . | . | 1 | 5 | 4 | 3 | 6 | 3 | 4 | 5 | 3 | 2 | 2 | 1 | 1 | 2 | 5 | 9 | 5 | 3 | 5 | 2 | 9 | |||
| Wall Brown | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||
| Gatekeeper / Hedge Brown | 83 | . | . | . | . | . | . | . | . | . | . | . | . | 11 | 10 | 18 | 17 | 11 | 10 | 6 | . | . | . | . | |||
| Meadow Brown | 59 | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | 22 | 11 | 9 | 3 | 3 | 2 | 2 | . | . | . | . | |||
| Small Heath | 3 | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Ringlet | 114 | . | . | . | . | . | . | . | . | . | . | 2 | 17 | 36 | 36 | 11 | 12 | . | . | . | . | . | . | . | |||