
| 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 | 15 | 5 | 1 | 11 | . | . | . | . | . | |||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 15 | 15 | . | . | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | 3 | 10 | 31 | 34 | 25 | 13 | 5 | 1 | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Wood White | . | . | . | . | . | . | . | 1 | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 1 | 8 | 2 | 12 | 3 | 1 | . | . | . | . | . | . | . | 3 | 13 | 1 | 2 | 5 | 2 | 1 | 2 | |||||
| Large White | . | . | . | . | 1 | 4 | 2 | 2 | 1 | . | 1 | 3 | 14 | 10 | 13 | 5 | 4 | 6 | 4 | 3 | 2 | |||||
| Small White | . | 1 | . | 2 | 1 | . | 3 | . | . | . | 3 | 2 | 13 | 1 | 3 | 4 | 6 | 2 | 2 | 2 | . | |||||
| Green-veined White | . | . | . | 3 | 1 | 2 | 3 | 1 | 3 | . | . | 1 | 1 | 23 | 14 | 5 | 4 | 4 | 1 | 2 | 1 | |||||
| Orange Tip | . | 1 | . | 7 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | |||||
| Common Blue | . | . | . | . | . | . | 7 | 11 | 5 | 1 | . | . | . | . | . | 10 | 15 | 14 | 1 | . | . | |||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | 1 | . | . | . | . | . | . | . | 2 | 2 | 1 | . | . | 2 | 6 | 12 | 3 | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | . | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | 2 | 5 | . | |||||
| Peacock | 3 | 10 | 5 | 9 | 5 | . | . | . | . | . | . | . | . | 24 | 31 | 8 | . | 1 | . | . | . | |||||
| Comma | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | 1 | . | 2 | 13 | |||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Speckled Wood | . | 1 | 2 | 4 | 4 | 6 | 3 | 4 | 3 | 7 | 6 | 1 | 1 | 7 | 3 | 18 | 20 | 21 | 22 | 25 | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 57 | 34 | 34 | 3 | 3 | 2 | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 18 | 28 | 26 | 13 | 4 | 2 | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | . | 1 | 4 | 22 | 21 | 11 | 21 | 5 | 5 | 3 | . | . | . | . | |||||
| Small Heath | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 256 | 166 | 180 | 22 | 9 | 8 | . | . | . | . | . | |||||