
| 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 | ||||||||||||||||||||||||||
| Small/Essex Skipper | . | . | . | . | . | . | . | . | 18 | 41 | 21 | 12 | 1 | . | . | . | . | . | . | |||||||
| Large Skipper | . | . | . | . | . | 1 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | . | . | . | . | . | . | |||||||
| Brimstone | . | 7 | 5 | 1 | . | 2 | . | 1 | 1 | 1 | 1 | . | 1 | . | 1 | . | . | . | . | |||||||
| Large White | . | . | 1 | . | . | . | . | . | 2 | 2 | . | 6 | 2 | 2 | . | . | 1 | . | . | |||||||
| Small White | . | . | . | 1 | 1 | . | . | . | . | 1 | 2 | 13 | 6 | . | 1 | . | . | . | . | |||||||
| Green-veined White | . | . | 1 | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | |||||||
| Small Copper | . | . | . | 1 | . | 4 | . | . | . | . | . | 1 | 1 | 1 | . | 1 | . | 2 | 3 | |||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||
| Common Blue | . | . | . | 1 | 17 | 16 | 16 | 5 | 4 | 2 | 1 | 32 | 34 | 30 | 27 | 5 | 1 | 1 | . | |||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 5 | . | . | . | . | |||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | . | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | 1 | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | 1 | |||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | |||||||
| Small Tortoiseshell | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Peacock | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | |||||||
| Speckled Wood | . | . | 1 | . | 1 | 1 | 2 | 2 | 1 | . | . | 3 | . | 2 | 1 | 3 | 1 | . | . | |||||||
| Marbled White | . | . | . | . | . | . | . | . | 2 | 2 | 1 | . | . | . | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 6 | 11 | 61 | 15 | 1 | 3 | . | . | . | . | |||||||
| Meadow Brown | . | . | . | . | . | 6 | 7 | 54 | 125 | 102 | 110 | 202 | 110 | 64 | 61 | 40 | 45 | 12 | 6 | |||||||
| Small Heath | . | . | 1 | . | . | 3 | 8 | . | 2 | 3 | . | . | . | 4 | 11 | 6 | 16 | . | . | |||||||
| Ringlet | . | . | . | . | . | . | 1 | 5 | 30 | 19 | 8 | 6 | . | . | . | . | . | . | . | |||||||