
| 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 | . | . | . | . | 2 | 5 | 4 | 8 | 21 | 45 | 97 | 6 | 4 | 3 | 2 | 2 | . | . | . | |||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 2 | . | 2 | . | . | |||||||
| Large Skipper | . | . | . | . | . | 10 | 11 | 2 | . | . | 3 | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | 5 | 17 | 7 | . | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | . | 19 | 6 | 8 | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | . | 9 | 6 | 6 | 2 | 4 | 1 | 1 | . | 1 | 16 | 8 | 10 | 1 | 3 | . | . | . | . | |||||||
| Large White | . | . | 1 | . | . | . | 1 | . | . | 3 | 23 | 6 | 7 | 2 | . | 4 | 8 | 2 | 3 | |||||||
| Small White | . | . | . | 1 | . | . | 2 | 1 | 5 | 7 | 25 | 20 | 8 | 14 | 10 | 35 | 11 | 5 | 1 | |||||||
| Green-veined White | . | 1 | 1 | . | . | . | . | . | 5 | . | 26 | 6 | 8 | 12 | 1 | 3 | 6 | 4 | . | |||||||
| Orange Tip | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 2 | 4 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | . | . | 2 | . | . | . | . | . | . | . | 5 | 3 | 2 | 2 | 3 | . | 3 | 1 | 1 | |||||||
| Brown Argus | . | 3 | 1 | . | . | . | 1 | . | . | . | . | 8 | 5 | 8 | 4 | 4 | 7 | . | . | |||||||
| Common Blue | 3 | 11 | 17 | 14 | 4 | 13 | 6 | . | . | 1 | 23 | 46 | 46 | 68 | 32 | 15 | 18 | 2 | 9 | |||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | 4 | 6 | 3 | 10 | 6 | 2 | . | . | . | |||||||
| Adonis Blue | . | 5 | 25 | 14 | 6 | 1 | 6 | . | . | . | . | . | 1 | 33 | 116 | 190 | 94 | 19 | 3 | |||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | |||||||
| Duke of Burgundy Fritillary | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | 1 | 5 | 2 | 1 | 2 | . | . | . | . | . | |||||||
| Painted Lady | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | 1 | . | 1 | . | 1 | . | |||||||
| Small Tortoiseshell | . | . | . | . | . | . | 1 | 4 | 5 | 4 | 6 | . | . | 1 | 1 | 16 | 6 | 3 | 1 | |||||||
| Peacock | . | 2 | . | . | . | . | . | . | . | 2 | 50 | 6 | 8 | 1 | . | . | . | . | . | |||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||
| Speckled Wood | . | 2 | 3 | 3 | 2 | 4 | 2 | . | . | . | 1 | 6 | 5 | 12 | 11 | 10 | 8 | 3 | 2 | |||||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 1 | . | . | . | . | . | |||||||
| Marbled White | . | . | . | . | . | 2 | 39 | 50 | 28 | 20 | 47 | 1 | . | . | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | 4 | 8 | 15 | 58 | 16 | 27 | 3 | 2 | 1 | . | . | . | |||||||
| Meadow Brown | . | . | . | . | 1 | 4 | 18 | 14 | 20 | 33 | 206 | 148 | 95 | 165 | 156 | 191 | 89 | 23 | 7 | |||||||
| Small Heath | . | 4 | 1 | 5 | 6 | 7 | 35 | 14 | 6 | 10 | 7 | 3 | 7 | 11 | 10 | 9 | 7 | 2 | . | |||||||
| Ringlet | . | . | . | . | . | 15 | 9 | 36 | 10 | 8 | 15 | . | . | . | . | . | . | . | . | |||||||