
| 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 | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | 1 | . | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 9 | 4 | . | 4 | 1 | 1 | 3 | 1 | . | 2 | 1 | . | . | 2 | 1 | 6 | 1 | 1 | . | . | 1 | |||||
| Large White | . | . | . | 1 | 4 | 1 | 4 | 4 | 2 | 1 | 2 | . | . | 4 | 3 | 4 | 2 | 2 | 1 | . | . | |||||
| Small White | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | 5 | 1 | 1 | 1 | 3 | . | . | . | |||||
| Green-veined White | . | 1 | . | 10 | 11 | 20 | 9 | 9 | 1 | 3 | . | 1 | 7 | 13 | 12 | 30 | 20 | 7 | 6 | . | 3 | |||||
| Orange Tip | . | 3 | 4 | 7 | 10 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | . | 1 | . | . | |||||
| Common Blue | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | 3 | 3 | . | . | 1 | . | |||||
| Holly Blue | . | 1 | 2 | 6 | 14 | 1 | 1 | . | . | . | . | . | . | 1 | 3 | 1 | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | 1 | . | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 4 | 2 | 3 | . | . | 1 | 1 | 1 | |||||
| Small Tortoiseshell | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | |||||
| Peacock | 2 | 5 | 1 | . | 1 | . | . | . | . | . | . | . | . | 2 | 5 | 11 | . | 1 | . | . | . | |||||
| Comma | 3 | . | . | 1 | . | . | . | . | . | . | . | 2 | 3 | 3 | 1 | 1 | . | 1 | . | . | 1 | |||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | 1 | . | . | . | . | |||||
| Speckled Wood | . | . | 1 | 5 | 1 | 2 | 7 | 11 | 5 | 7 | 6 | 3 | . | 4 | 2 | 12 | 4 | 6 | 4 | 15 | 9 | |||||
| Wall Brown | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | 1 | 5 | 9 | 3 | 4 | 2 | 2 | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 13 | 13 | 18 | 15 | 3 | 5 | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 2 | 5 | 51 | 53 | 67 | 52 | 58 | 43 | 48 | 41 | 11 | 18 | 1 | 1 | |||||
| Small Heath | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 17 | 34 | 16 | 15 | 5 | 1 | . | . | . | . | . | |||||