
| 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 | . | . | . | . | . | . | . | . | . | . | 6 | . | 6 | . | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | 4 | 6 | 12 | 4 | 8 | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | . | . | . | . | 2 | 8 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 2 | 10 | 12 | 2 | 2 | . | 2 | . | . | . | . | 4 | 2 | . | . | . | 4 | . | ||||||||
| Large White | . | . | . | 2 | 4 | 8 | 4 | 2 | . | . | . | 8 | 8 | 8 | 8 | . | . | . | ||||||||
| Small White | . | 4 | . | . | 4 | . | . | . | . | . | . | . | 4 | 2 | 4 | . | . | . | ||||||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | 8 | . | . | . | . | . | . | ||||||||
| Orange Tip | . | 6 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | ||||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | ||||||||
| Common Blue | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Holly Blue | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Duke of Burgundy Fritillary | . | . | . | . | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | 4 | . | . | ||||||||
| Peacock | . | 6 | . | . | . | . | . | . | . | . | . | 4 | 2 | . | 4 | . | . | . | ||||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||||||
| Small Pearl-bordered Fritillary | . | . | . | 2 | 26 | 56 | 26 | 18 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Pearl-bordered Fritillary | . | . | 8 | . | 12 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | 4 | . | 8 | 2 | . | . | . | . | . | ||||||||
| Marsh Fritillary | . | . | . | 2 | 12 | 18 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | . | . | . | . | . | 4 | 2 | . | . | . | . | 8 | 6 | 14 | 6 | 2 | . | . | ||||||||
| Marbled White | . | . | . | . | . | . | . | . | 66 | 104 | 142 | . | . | . | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 14 | 20 | 60 | 30 | 2 | . | . | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 12 | 58 | 42 | 64 | 4 | 20 | 16 | 2 | . | . | . | ||||||||
| Ringlet | . | . | . | . | . | . | . | . | 110 | 158 | 130 | 2 | . | . | . | . | . | . | ||||||||