
| 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 | Ind | ||||||||||||||||||||||||||
| Small Skipper | 122 | . | . | . | . | . | . | . | . | . | . | 10 | 17 | . | 63 | 20 | . | 2 | . | . | . | . | . | ||||
| Large Skipper | 88 | . | . | . | . | . | 1 | . | 9 | 26 | 16 | 15 | 7 | 14 | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | 9 | . | . | . | 5 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 40 | . | 4 | . | 6 | 2 | 6 | . | . | . | . | . | . | . | . | . | 4 | 1 | 1 | . | . | 1 | . | ||||
| Large White | 16 | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | 2 | . | 3 | 7 | . | 1 | . | . | ||||
| Small White | 30 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 4 | 4 | 2 | 4 | 3 | 2 | . | ||||
| Green-veined White | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Purple Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | ||||
| Small Copper | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||
| Common Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||
| Red Admiral | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||
| Small Tortoiseshell | 17 | 1 | . | . | . | . | 1 | . | . | 1 | 2 | . | . | . | . | . | 2 | 1 | 2 | . | 2 | . | . | ||||
| Peacock | 42 | 7 | . | . | 3 | 4 | 1 | . | . | . | . | . | . | 1 | 5 | 5 | 8 | . | . | . | . | . | . | ||||
| Comma | 11 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 9 | 1 | . | ||||
| Small Pearl-bordered Fritillary | 16 | . | . | . | . | 1 | 5 | 2 | 3 | . | . | . | 5 | . | . | . | . | . | . | . | . | . | . | ||||
| Pearl-bordered Fritillary | 20 | . | . | . | 15 | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | 7 | . | . | . | . | . | . | . | . | 5 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | 43 | . | . | . | . | . | . | . | 2 | 2 | 6 | 12 | 8 | 4 | 5 | 1 | 2 | . | . | . | . | . | . | ||||
| Marsh Fritillary | 21 | . | . | . | . | 13 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | 32 | . | . | . | 1 | . | 1 | 4 | 2 | 3 | . | . | . | 1 | 3 | 3 | 2 | . | 6 | 1 | . | . | . | ||||
| Marbled White | 379 | . | . | . | . | . | . | . | . | 1 | 26 | 77 | 230 | 26 | 19 | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 383 | . | . | . | . | . | . | . | . | . | . | . | 20 | 36 | 140 | 61 | 65 | 7 | . | . | . | . | . | ||||
| Meadow Brown | 144 | . | . | . | . | . | . | 1 | 2 | 9 | 42 | 17 | 2 | 8 | 25 | 18 | 4 | 3 | . | . | . | . | . | ||||
| Ringlet | 215 | . | . | . | . | . | . | . | . | 11 | 30 | 72 | 73 | 12 | 18 | 1 | . | . | . | . | . | . | . | ||||