
| 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/Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||
| Silver-spotted Skipper | 28 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 11 | 13 | . | . | . | . | . | |||
| Large Skipper | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 15 | . | . | 1 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 6 | . | 2 | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||
| Large White | 10 | . | . | . | 1 | . | . | . | . | . | . | . | . | 3 | . | . | 1 | . | 1 | 1 | . | 1 | 2 | 1 | |||
| Small White | 8 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | 1 | . | . | 2 | 3 | . | |||
| Small Copper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||
| Common Blue | 44 | . | . | . | 1 | 6 | 12 | 4 | 3 | 1 | . | . | . | . | 3 | 1 | 3 | 3 | 3 | . | . | . | . | . | |||
| Chalk-hill Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||
| Holly Blue | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||
| Small Tortoiseshell | 9 | 2 | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | 2 | 3 | . | 1 | . | . | . | . | |||
| Peacock | 4 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Speckled Wood | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Marbled White | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 45 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 10 | 5 | 3 | 12 | 2 | 9 | 1 | . | . | . | |||
| Meadow Brown | 72 | . | . | . | . | . | . | . | . | . | 3 | . | 3 | 4 | 2 | 10 | 9 | 11 | 10 | 7 | 2 | 2 | 4 | 2 | |||
| Small Heath | 98 | . | . | . | . | 1 | 5 | 4 | 4 | 9 | 15 | 3 | . | 1 | . | 1 | 3 | 10 | 14 | 16 | . | 3 | 1 | 2 | |||