
| 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 | 2 | 30 | 11 | 2 | 2 | 1 | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | 7 | 6 | 8 | 9 | 28 | 23 | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 4 | 5 | 2 | 2 | . | . | . | 1 | 1 | . | . | . | . | . | 2 | 6 | 7 | 11 | 10 | 15 | . | 1 | 2 | |||
| Large White | . | . | . | . | . | . | 1 | 1 | 1 | . | 1 | . | . | 1 | 3 | 10 | 5 | 4 | 9 | 9 | 1 | . | . | |||
| Small White | . | . | 1 | . | . | . | . | . | 1 | . | 1 | 1 | . | 2 | 5 | 17 | 3 | 14 | 13 | 4 | . | . | . | |||
| Green-veined White | . | 2 | 1 | 15 | 10 | 17 | 18 | 17 | 3 | 4 | 7 | . | . | 3 | 12 | 13 | 36 | 18 | 23 | 12 | 3 | . | . | |||
| Orange Tip | 1 | 8 | 12 | 15 | 5 | 8 | 4 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 3 | 1 | 1 | . | . | . | . | . | . | |||
| Purple Emperor | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | 1 | 1 | 1 | 2 | . | . | . | 1 | 1 | . | 1 | 3 | 2 | 1 | 1 | . | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Tortoiseshell | . | 1 | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 1 | 1 | 1 | . | . | . | . | . | . | |||
| Peacock | 1 | 2 | . | 3 | 1 | . | . | 1 | 1 | . | . | . | . | . | 3 | 1 | 6 | 5 | 7 | 3 | 2 | . | . | |||
| Comma | . | 2 | . | 1 | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | 2 | 3 | 5 | . | 1 | 1 | 1 | 1 | |||
| Pearl-bordered Fritillary | . | . | . | . | . | 1 | 2 | 1 | 7 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | 5 | 3 | 7 | 7 | 14 | 6 | 4 | 7 | 3 | 2 | . | . | . | |||
| Speckled Wood | . | . | . | 1 | 1 | 3 | 1 | 2 | 13 | 11 | 21 | 11 | 17 | 7 | 12 | 15 | 20 | 19 | 25 | 20 | 20 | 17 | 22 | |||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 20 | 17 | 14 | 3 | 1 | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 10 | 2 | 8 | 2 | 3 | 5 | . | 1 | . | . | . | |||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 2 | 8 | 50 | 29 | 35 | 10 | 1 | 1 | . | . | . | . | . | |||