
| 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 Skipper | . | . | . | . | . | . | . | . | . | . | 4 | 4 | . | . | . | . | . | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | . | 4 | 8 | 4 | 4 | . | . | . | . | . | . | . | ||||||||
| Brimstone | 10 | 12 | 6 | 14 | 12 | 4 | 2 | . | . | 2 | 2 | 6 | 2 | . | . | . | . | . | ||||||||
| Large White | . | . | 6 | 2 | . | 4 | 2 | . | 8 | 14 | 8 | 8 | 6 | . | 10 | 10 | 6 | . | ||||||||
| Small White | . | . | . | 16 | 6 | 2 | 2 | . | . | 2 | 2 | . | 6 | 10 | 10 | 6 | 2 | . | ||||||||
| Green-veined White | . | 14 | 18 | 12 | 12 | 2 | 2 | . | . | 4 | 28 | 62 | 12 | 10 | 8 | 4 | . | . | ||||||||
| Orange Tip | 6 | 18 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | . | . | 4 | . | . | . | . | . | 4 | 8 | 4 | . | 2 | 2 | 2 | . | ||||||||
| Common Blue | . | . | . | . | . | . | 2 | 2 | 2 | . | . | . | 2 | 4 | . | . | 2 | . | ||||||||
| Holly Blue | . | . | . | 4 | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | ||||||||
| Red Admiral | . | . | 2 | . | . | . | . | . | 2 | . | . | . | 2 | . | . | . | 2 | . | ||||||||
| Painted Lady | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 6 | 2 | . | . | . | . | . | 2 | 2 | 4 | 2 | . | . | . | . | 2 | . | . | ||||||||
| Peacock | 2 | 6 | . | 8 | 2 | 2 | 8 | . | 2 | . | . | 6 | . | . | 2 | . | . | . | ||||||||
| Comma | 2 | . | . | . | . | . | . | . | 2 | 2 | 2 | 4 | . | 2 | 2 | . | 4 | . | ||||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | . | 2 | . | . | . | . | 4 | . | 4 | 4 | 2 | 8 | 18 | 2 | 12 | 16 | 8 | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 2 | 8 | 38 | 4 | 2 | . | 2 | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 2 | 10 | 26 | 8 | 8 | 8 | . | 6 | . | . | . | ||||||||
| Ringlet | . | . | . | . | . | . | . | . | 2 | . | 2 | 2 | . | . | . | . | . | . | ||||||||