
| 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 | 85 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 17 | 27 | 13 | 6.5 | 2 | 6 | . | . | . | . | |||
| Large Skipper | 26 | . | . | . | . | . | . | . | . | . | 1 | 5 | 5 | 9 | 4 | . | 2 | . | . | . | . | . | . | . | |||
| Dingy Skipper | 3 | . | . | . | . | . | . | . | . | 0.5 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 25 | . | . | . | . | 2 | 3 | 3 | 5 | 2 | 2 | 4 | 1 | 1 | 2 | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 18 | 1 | 3.5 | 3 | . | 2 | 1 | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | 1 | 1 | 1 | . | 1 | |||
| Large White | 26 | . | . | . | . | . | . | 1 | . | 2 | 2 | 1 | 1 | . | . | . | . | 1.5 | 6 | 4 | 2 | 1 | 2 | 1 | |||
| Small White | 165 | . | 0.5 | 2 | . | 3 | 1 | . | 2 | 1.5 | 3 | 2 | 2 | . | 1 | 3 | 2 | 18.5 | 28 | 55 | 13 | 10 | 7 | 2 | |||
| Green-veined White | 78 | . | . | . | . | . | . | 2 | 2 | 1.5 | . | . | . | . | . | 1 | 5 | 11.5 | 10 | 18 | 10 | 10 | 2 | . | |||
| Orange Tip | 4 | . | . | . | . | 2 | . | . | 1 | 0.5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | 16 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 0.5 | 1 | 5 | 3 | 2 | 1 | 1 | |||
| Common Blue | 17 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 2 | 2 | 2 | 5 | 1 | |||
| Duke of Burgundy Fritillary | 18 | . | . | . | . | . | . | 2 | 7 | 5.5 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| White Admiral | 21 | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 9 | 3 | 3 | 0.5 | . | . | . | . | . | . | |||
| Red Admiral | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 2 | 1 | . | 1 | . | |||
| Painted Lady | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1.5 | . | . | . | . | . | . | |||
| Small Tortoiseshell | 12 | 1 | 1.5 | 1 | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 2.5 | 3 | . | . | . | . | . | |||
| Peacock | 95 | . | 6 | 7 | 6 | 6 | 4 | 2 | . | 1.5 | 1 | . | . | . | . | . | . | 5 | 22 | 24 | 8 | 2 | . | . | |||
| Comma | 43 | 1 | 5.5 | 4 | 1 | . | 1 | 1 | . | . | . | . | . | . | 2 | 1 | 5 | 1.5 | 5 | 8 | 5 | 2 | . | . | |||
| Small Pearl-bordered Fritillary | 21 | . | . | . | . | . | . | . | . | 2.5 | 8 | 5 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | 15 | . | . | . | . | . | . | . | 4 | 4.5 | 4 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | 6 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | 1 | 0.5 | 1 | . | . | . | . | . | |||
| Silver-washed Fritillary | 84 | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 9 | 12 | 13 | 13 | 16 | 14 | 2 | . | . | . | |||
| Speckled Wood | 57 | . | . | . | . | 1 | . | . | . | 2 | 2 | 2 | 8 | 5 | 5 | 1 | 1 | 4 | . | . | 3 | 5 | 7 | 5 | |||
| Marbled White | 30 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 10 | 10 | 6 | 2 | 1 | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 206 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 8 | 25 | 22.5 | 30 | 54 | 26 | 24 | 2 | 1 | |||
| Meadow Brown | 67 | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 16 | 12 | 16 | 7 | 5 | 3 | 2 | 2 | . | . | . | |||
| Ringlet | 149 | . | . | . | . | . | . | . | . | . | . | . | 1 | 30 | 38 | 47 | 24 | 6 | 2 | 1 | . | . | . | . | |||