
| 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 | . | . | . | . | . | . | . | . | . | . | . | 13 | 49 | 66 | 48 | 21 | 5 | 1 | . | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | 2 | 11 | 10 | 18 | 5 | 1 | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | 1 | 4 | 4 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||
| Brimstone | 6 | 6 | 3 | 2 | 1 | 1 | . | 1 | . | . | . | . | . | 3 | . | 1 | . | 1 | 2 | 4 | . | 1 | . | |||
| Large White | . | . | . | . | 1 | . | 1 | 2 | . | . | . | 1 | 4 | 4 | 6 | 9 | 1 | 1 | 2 | . | . | . | . | |||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 6 | 25 | 4 | 2 | 9 | 7 | 3 | . | . | |||
| Green-veined White | . | . | . | . | . | 1 | 4 | 1 | . | . | . | . | 2 | 5 | 14 | 12 | 5 | 1 | 4 | 8 | 11 | 3 | 2 | |||
| Orange Tip | . | 2 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 9 | 19 | 6 | 8 | 3 | 1 | 2 | 7 | |||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | |||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 4 | 9 | 3 | . | . | . | |||
| Holly Blue | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | 2 | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | 2 | 6 | 6 | 2 | . | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 3 | 4 | 3 | 1 | 1 | . | |||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | 2 | 9 | 11 | 3 | 3 | 1 | |||
| Peacock | 6 | 12 | 2 | 4 | 1 | . | . | . | . | 1 | . | 1 | . | 1 | 56 | 44 | 55 | 6 | 30 | 13 | . | . | 3 | |||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | |||
| Pearl-bordered Fritillary | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 5 | 2 | . | 5 | 3 | 1 | . | . | . | . | . | . | |||
| Marsh Fritillary | . | . | . | . | . | 15 | 21 | 13 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Speckled Wood | . | . | . | 2 | 2 | . | 1 | 2 | 9 | 18 | 19 | 6 | 9 | 1 | 8 | 6 | 13 | 15 | 39 | 13 | 31 | 19 | 12 | |||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 2 | 14 | 11 | 12 | . | . | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 1 | 11 | 34 | 46 | 47 | 32 | 16 | 2 | 1 | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | 1 | 2 | 60 | 65 | 96 | 78 | 65 | 24 | 3 | . | . | . | . | . | . | |||
| Small Heath | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | |||
| Ringlet | . | . | . | . | . | . | . | . | . | 2 | 30 | 90 | 64 | 42 | 8 | 1 | . | . | . | . | . | . | . | |||