
| 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 | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 46 | 63 | 43 | 101 | 30 | 2 | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 1 | 2 | 6 | 10 | . | 6 | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | 1 | 4 | 13 | 28 | 21 | 5 | 4 | 5 | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 3 | 2 | 5 | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | 9 | 11 | . | 2 | . | . | ||||
| Large White | . | . | . | 1 | 4 | 8 | . | 2 | . | 1 | . | 2 | . | 3 | 5 | 2 | 2 | 6 | . | . | . | . | ||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 7 | . | 1 | . | . | ||||
| Green-veined White | . | . | . | 7 | 4 | 5 | 4 | 4 | . | 1 | . | . | . | 2 | 4 | 8 | 5 | 4 | 1 | . | . | . | ||||
| Orange Tip | . | 1 | 2 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | 3 | 2 | . | 1 | . | . | . | . | . | . | . | 2 | 3 | 8 | 7 | . | . | ||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 5 | 6 | 8 | 5 | . | ||||
| Holly Blue | . | 1 | . | 2 | 2 | 1 | 1 | 1 | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||
| Duke of Burgundy Fritillary | . | . | . | 4 | 8 | 7 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 2 | 6 | 4 | 1 | . | . | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | 1 | ||||
| Small Tortoiseshell | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | 4 | 1 | 4 | 2 | ||||
| Peacock | 4 | 24 | 20 | 6 | 2 | . | . | . | . | . | . | . | . | . | 1 | 29 | 32 | 17 | . | 1 | . | . | ||||
| Comma | 2 | 2 | . | . | . | 1 | . | . | . | . | . | . | . | 4 | . | . | 3 | 1 | . | 1 | 1 | 13 | ||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Pearl-bordered Fritillary | . | . | . | . | 8 | 7 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 4 | . | . | . | . | ||||
| Speckled Wood | . | 11 | 22 | 23 | 11 | 10 | 4 | 2 | 3 | 5 | 7 | 8 | 1 | 3 | . | 11 | 15 | 12 | 22 | 11 | 19 | 16 | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 15 | 31 | 50 | 28 | 5 | 7 | 2 | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 25 | 76 | 214 | 247 | 146 | 20 | 2 | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 5 | 8 | 180 | 362 | 329 | 140 | 194 | 145 | 44 | 2 | . | . | . | ||||
| Small Heath | . | . | . | . | 3 | 5 | 10 | 3 | 1 | . | 2 | 10 | . | . | 1 | 1 | . | . | . | 1 | . | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | 127 | 224 | 241 | 138 | 22 | 15 | . | . | . | . | . | ||||