
| 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 | 31 | . | . | . | . | . | . | . | . | . | . | . | 10 | 11 | 7 | 2 | . | 1 | . | . | . | . | . | . | |||
| Large Skipper | 14 | . | . | . | . | . | . | . | . | 1 | 4 | 4 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | 2 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 2 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 81 | 10 | 7 | 10 | 4 | 16 | 4 | . | 4 | 1 | . | . | . | 1 | 4 | 5 | . | 6 | . | . | 1 | . | 1 | 6 | |||
| Large White | 17 | . | . | . | 1 | . | 1 | . | 2 | . | . | . | . | . | 1 | 6 | 2 | 3 | . | . | . | . | . | 1 | |||
| Small White | 40 | . | . | . | . | . | . | 2 | . | . | . | . | 1 | 1 | 1 | 4 | . | 1 | 3 | 3 | 15 | 4 | 2 | . | |||
| Green-veined White | 20 | . | 1 | 2 | 3 | 4 | 4 | 2 | . | . | . | . | . | . | 2 | . | 1 | . | . | 1 | . | . | . | . | |||
| Orange Tip | 5 | . | 1 | 1 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 2 | 1 | 1 | . | |||
| Common Blue | 13 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 4 | 1 | 3 | . | 1 | . | |||
| Holly Blue | 8 | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | 1 | 1 | 1 | . | . | . | . | 1 | . | . | |||
| Purple Emperor | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | 6 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | 1 | 1 | . | 1 | |||
| Painted Lady | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | |||
| Small Tortoiseshell | 14 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 7 | 1 | . | |||
| Peacock | 37 | 3 | 4 | 4 | 3 | 1 | 2 | . | . | 1 | . | . | . | 1 | 2 | 3 | 2 | . | . | . | . | 1 | 5 | 2 | |||
| Comma | 32 | . | 1 | . | . | . | . | . | . | . | . | . | 3 | 2 | . | . | . | . | . | . | 2 | 8 | 4 | 6 | |||
| Pearl-bordered Fritillary | 4 | . | . | . | . | 1 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 5 | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | 2 | . | . | . | . | . | . | . | . | |||
| Marsh Fritillary | 3 | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Speckled Wood | 114 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 6 | 8 | 2 | 3 | 1 | 1 | 8 | 4 | 7 | 8 | 12 | 14 | 16 | 4 | 3 | 3 | |||
| Wall Brown | 19 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 6 | 5 | . | . | . | 2 | 2 | |||
| Marbled White | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 18 | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 3 | 2 | 4 | 2 | 2 | . | . | . | . | . | |||
| Meadow Brown | 171 | . | . | . | . | . | . | . | . | 1 | 7 | 28 | 57 | 43 | 8 | 10 | 13 | 4 | . | . | . | . | . | . | |||
| Ringlet | 67 | . | . | . | . | . | . | . | . | . | 1 | 8 | 28 | 22 | 6 | 2 | . | . | . | . | . | . | . | . | |||