
| 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 | 9 | . | . | . | . | . | . | . | . | . | . | 3 | . | 3 | . | . | . | . | . | ||||||||
| Large Skipper | 24 | . | . | . | . | . | . | 2 | 3 | 6 | 2 | 4 | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | 8 | . | . | . | . | 1 | 4 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 30 | 1 | 5 | 6 | 1 | 1 | . | 1 | . | . | . | . | 2 | 1 | . | . | . | 2 | . | ||||||||
| Large White | 33 | . | . | . | 1 | 2 | 4 | 2 | 1 | . | . | . | 4 | 4 | 4 | 4 | . | . | . | ||||||||
| Small White | 11 | . | 2 | . | . | 2 | . | . | . | . | . | . | . | 2 | 1 | 2 | . | . | . | ||||||||
| Green-veined White | 8 | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | ||||||||
| Orange Tip | 6 | . | 3 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Brown Argus | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Common Blue | 3 | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Holly Blue | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Duke of Burgundy Fritillary | 3 | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 4 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 2 | . | . | ||||||||
| Peacock | 12 | . | 3 | . | . | . | . | . | . | . | . | . | 2 | 1 | . | 2 | . | . | . | ||||||||
| Comma | 2 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Small Pearl-bordered Fritillary | 69 | . | . | . | 1 | 13 | 28 | 13 | 9 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Pearl-bordered Fritillary | 13 | . | . | 4 | . | 6 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Dark Green Fritillary | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||||
| Silver-washed Fritillary | 12 | . | . | . | . | . | . | . | . | . | 2 | . | 4 | 1 | . | . | . | . | . | ||||||||
| Marsh Fritillary | 16 | . | . | . | 1 | 6 | 9 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | 27 | . | . | . | . | . | 2 | 1 | . | . | . | . | 4 | 3 | 7 | 3 | 1 | . | . | ||||||||
| Marbled White | 208 | . | . | . | . | . | . | . | . | 33 | 52 | 71 | . | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 106 | . | . | . | . | . | . | . | . | . | 7 | 10 | 30 | 15 | 1 | . | . | . | . | ||||||||
| Meadow Brown | 150 | . | . | . | . | . | . | . | 6 | 29 | 21 | 32 | 2 | 10 | 8 | 1 | . | . | . | ||||||||
| Ringlet | 261 | . | . | . | . | . | . | . | . | 55 | 79 | 65 | 1 | . | . | . | . | . | . | ||||||||