
| 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 | . | . | . | . | . | . | . | 6 | . | 10 | 22 | 10 | 4 | . | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | . | 1 | 1 | . | 6 | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Brimstone | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Large White | . | . | 1 | . | 2 | 5 | 2 | 1 | . | 36 | 3 | 2 | . | . | . | 2 | . | . | ||||||||
| Small White | . | . | . | . | . | . | . | . | . | 5 | 1 | . | . | . | . | 11 | 11 | 1 | ||||||||
| Green-veined White | 1 | 15 | 20 | 8 | 7 | 1 | 2 | . | . | 40 | 16 | 17 | 15 | 9 | 8 | 25 | 7 | 3 | ||||||||
| Orange Tip | 2 | 3 | 7 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | 1 | . | . | . | 1 | . | . | . | . | . | 4 | 16 | 3 | 4 | 1 | 1 | 4 | ||||||||
| Brown Argus | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 7 | . | . | . | . | . | ||||||||
| Common Blue | . | . | 1 | 1 | 7 | 1 | . | . | . | . | 6 | 5 | 7 | 6 | 2 | 1 | . | . | ||||||||
| Holly Blue | . | 4 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | . | . | . | . | . | . | 1 | 1 | . | 2 | 3 | . | . | 1 | 1 | 1 | 9 | . | ||||||||
| Painted Lady | . | . | . | . | . | 2 | . | . | . | 2 | . | . | 1 | . | . | . | . | . | ||||||||
| Small Tortoiseshell | . | . | . | 1 | 3 | 3 | 6 | . | . | . | . | . | . | 6 | . | . | 1 | . | ||||||||
| Peacock | 13 | 13 | 11 | 9 | 5 | 7 | 4 | . | . | 8 | 23 | 8 | 7 | . | . | 3 | . | . | ||||||||
| Comma | 1 | 2 | . | 2 | . | . | 3 | 1 | . | 16 | 3 | 1 | 3 | . | . | 2 | 1 | 2 | ||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | ||||||||
| Speckled Wood | 1 | 3 | 1 | 1 | . | 4 | 9 | . | 3 | . | 6 | 2 | 7 | . | 3 | . | . | . | ||||||||
| Wall Brown | . | . | 7 | 5 | . | . | . | . | . | . | 2 | 8 | 14 | 3 | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | 1 | 5 | 1 | 22 | 14 | 24 | 23 | . | . | . | . | . | ||||||||
| Meadow Brown | . | . | 3 | 1 | 1 | 9 | 10 | 22 | 21 | 60 | 47 | 72 | 61 | 5 | 1 | . | . | . | ||||||||
| Small Heath | . | . | 3 | 3 | 4 | 9 | 11 | . | 2 | . | . | 2 | . | . | 4 | 1 | . | . | ||||||||
| Ringlet | . | . | . | . | . | . | 4 | . | . | . | 4 | 2 | . | . | . | . | . | . | ||||||||