
| 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 | ||||||||||||||||||||||||||
| Large Skipper | . | . | . | . | . | . | 4 | 4 | 6 | 22 | 10 | 14 | 12 | . | 2 | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Wood White | . | . | . | 6 | 2 | 10 | 4 | 2 | 2 | . | . | . | 8 | . | 12 | 4 | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | 8 | . | . | . | . | . | . | ||||||
| Brimstone | . | 6 | 10 | 4 | . | . | 2 | . | . | . | . | . | 6 | 12 | 4 | . | 2 | 2 | . | . | ||||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | 4 | . | 2 | . | . | . | 6 | . | . | ||||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | 2 | . | 2 | . | ||||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | . | . | ||||||
| Green Hairstreak | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 4 | 24 | 14 | . | 2 | . | . | ||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | ||||||
| Purple Emperor | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | . | . | 2 | . | . | ||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | ||||||
| Peacock | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | 2 | ||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | ||||||
| Pearl-bordered Fritillary | . | . | . | 4 | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | 24 | 14 | 12 | 12 | 20 | 6 | 4 | . | . | . | . | ||||||
| Speckled Wood | . | 6 | 12 | 4 | 14 | 2 | 10 | 2 | . | . | . | . | . | 4 | 6 | 8 | 8 | 16 | 18 | 6 | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 12 | . | . | . | . | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 54 | 170 | 144 | 386 | 70 | 18 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 6 | 34 | 92 | 80 | 150 | 260 | 128 | 232 | 98 | 26 | 10 | . | . | ||||||
| Small Heath | . | . | . | . | 2 | 10 | 8 | 2 | 2 | . | . | . | . | 2 | 2 | 10 | 4 | 4 | 2 | 2 | ||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 70 | 120 | 116 | 6 | 2 | 4 | . | . | . | . | . | ||||||