
| 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 | ||||||||||||||||||||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | |||||
| Brimstone | 15 | . | 16 | 16 | 8 | 9 | 6 | . | . | . | . | . | 3 | 2 | 1 | 1 | 1 | 1 | . | . | 1 | |||||
| Large White | . | . | . | . | . | 2 | . | 1 | . | . | . | . | 2 | . | 2 | . | . | . | . | . | . | |||||
| Small White | . | . | 1 | 1 | 1 | 2 | . | . | . | 2 | 1 | . | 1 | . | 1 | 1 | . | 1 | . | 1 | . | |||||
| Green-veined White | . | . | 2 | . | 2 | 1 | 3 | . | . | . | . | 2 | 1 | . | . | . | . | 1 | 1 | . | . | |||||
| Orange Tip | . | . | 1 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | 1 | . | . | . | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||
| Peacock | 11 | . | 17 | 8 | 11 | 5 | 3 | . | 1 | . | . | 1 | . | 1 | 3 | 2 | 3 | 1 | . | . | . | |||||
| Comma | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | |||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | 3 | . | . | 1 | 2 | 1 | 2 | . | . | . | . | |||||
| Speckled Wood | 2 | . | 4 | 3 | 3 | 1 | 7 | 5 | 1 | 1 | 1 | 4 | 9 | . | 9 | 8 | 16 | 12 | 4 | 3 | 2 | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 2 | . | . | . | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 4 | 2 | 12 | 4 | 11 | 6 | 4 | 2 | . | 1 | . | . | . | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | 5 | 5 | 7 | 2 | . | . | . | . | . | . | . | . | |||||