
| 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 | . | . | . | . | . | . | . | . | . | . | . | 18 | 36 | 22 | 8 | 4 | . | . | . | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | 8 | 26 | 10 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | 4 | 6 | 26 | 34 | 8 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | 10 | 14 | 30 | 4 | 14 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | |||
| Brimstone | . | 6 | 10 | 4 | 6 | 6 | 2 | 2 | . | 4 | . | . | . | 4 | 22 | 14 | 12 | 6 | . | . | 8 | 10 | . | |||
| Large White | . | . | . | . | 2 | 2 | . | . | . | 2 | . | 2 | 10 | 30 | 44 | 14 | 18 | 12 | 6 | . | 6 | . | 4 | |||
| Small White | . | . | 2 | . | . | . | . | . | . | . | . | . | 2 | . | 4 | 6 | 8 | 10 | . | 6 | 10 | . | 2 | |||
| Green-veined White | . | . | 2 | . | . | . | . | . | . | . | . | . | . | 6 | 22 | 8 | 2 | 2 | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | . | 6 | 18 | 8 | 16 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 4 | . | |||
| Small Blue | . | . | . | . | . | 2 | 10 | 8 | 10 | 6 | . | . | . | 6 | . | 8 | . | . | . | . | . | . | . | |||
| Brown Argus | . | . | . | . | . | 16 | 12 | 12 | . | 2 | . | . | . | 4 | 6 | 40 | 30 | 16 | 20 | 2 | 2 | 2 | 4 | |||
| Common Blue | . | . | . | . | . | 116 | 176 | 218 | 82 | 100 | 12 | . | 4 | 12 | 20 | 80 | 68 | 66 | 64 | 22 | 14 | 26 | 14 | |||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | |||
| Holly Blue | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | . | . | 2 | . | 6 | 4 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | 4 | 2 | . | 2 | . | . | . | 2 | 2 | 2 | . | 2 | . | . | |||
| Painted Lady | . | . | . | . | . | . | . | 6 | 4 | . | 2 | . | . | . | 2 | 2 | . | . | . | . | . | . | . | |||
| Small Tortoiseshell | 4 | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | |||
| Peacock | 2 | 6 | 4 | 2 | 4 | . | . | . | . | . | . | . | . | 4 | 8 | . | 6 | . | . | 10 | . | . | . | |||
| Comma | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | |||
| Pearl-bordered Fritillary | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | 4 | 6 | 236 | 224 | 134 | 112 | 26 | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||
| Marsh Fritillary | . | . | . | . | . | 6 | 14 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Speckled Wood | . | 4 | 4 | . | 2 | 8 | 10 | 14 | . | 2 | . | . | . | 4 | 2 | 10 | 20 | 14 | 12 | . | 4 | 10 | 8 | |||
| Marbled White | . | . | . | . | . | . | . | . | 4 | 100 | 150 | 150 | 116 | 8 | 4 | . | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 16 | 30 | 86 | 96 | 24 | 18 | 10 | 2 | 2 | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | 2 | 4 | 16 | 38 | 78 | 36 | 226 | 378 | 586 | 542 | 538 | 450 | 178 | 176 | 152 | 158 | |||
| Small Heath | . | . | . | . | . | 14 | 8 | 6 | 4 | 106 | 66 | 140 | 72 | 34 | 16 | 30 | 38 | 26 | 30 | 14 | 6 | 12 | 2 | |||
| Ringlet | . | . | . | . | . | . | . | . | 6 | 100 | 132 | 80 | 26 | 4 | . | . | . | . | . | . | . | . | . | |||