
| 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 | 1 | 1 | 7 | 12 | 1 | . | . | . | . | . | . | |||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 14 | . | 4 | 1 | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | 3 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | 10 | 14 | 8 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | 2 | 23 | 12 | 9 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | 1 | . | . | . | 2 | . | . | . | 2 | 2 | 5 | 4 | 4 | 1 | 3 | |||
| Brimstone | . | . | . | 2 | 15 | 2 | 1 | 4 | . | . | . | . | . | . | 1 | 11 | 3 | 12 | 5 | 1 | . | 5 | 2 | |||
| Large White | . | . | . | . | . | 4 | . | 2 | . | 1 | . | . | 3 | 11 | 16 | 16 | 15 | 7 | 4 | 4 | 1 | 1 | . | |||
| Small White | . | . | . | . | 2 | . | . | 2 | . | . | . | 4 | 3 | 10 | 3 | 5 | 6 | 2 | . | 2 | 7 | . | 1 | |||
| Green-veined White | . | . | . | 3 | 3 | 4 | 3 | 2 | . | . | . | 1 | 3 | 24 | 24 | 14 | 9 | 9 | 3 | 4 | . | . | . | |||
| Orange Tip | . | . | . | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | 2 | 3 | 4 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | 2 | 3 | 2 | . | 1 | . | . | . | . | 2 | . | 5 | 2 | 3 | . | 1 | . | . | 1 | 1 | |||
| Brown Argus | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 3 | 3 | 1 | . | |||
| Common Blue | . | . | . | . | . | 20 | 30 | 16 | 4 | 3 | 1 | . | . | . | 2 | 14 | 11 | 25 | 25 | 24 | 19 | 5 | 8 | |||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 50 | 676 | 1267 | 868 | 448 | 63 | 76 | 9 | 5 | 1 | |||
| Adonis Blue | . | . | . | . | . | 2 | 4 | 3 | 1 | . | . | . | . | . | 1 | . | . | 6 | 9 | 15 | 1 | 2 | 1 | |||
| Holly Blue | . | . | . | 4 | 6 | 2 | . | . | . | . | . | . | . | 8 | . | 12 | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 1 | 3 | 2 | 1 | 3 | 9 | . | 2 | 3 | |||
| Painted Lady | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | |||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 3 | 3 | 2 | 2 | 1 | . | . | . | 2 | 5 | 1 | |||
| Peacock | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | 5 | 15 | 6 | 4 | 1 | . | . | 1 | . | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | 2 | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Speckled Wood | . | . | . | 3 | 2 | 3 | 3 | 3 | 1 | . | 1 | . | . | 1 | 4 | 3 | 9 | 5 | 12 | 8 | 4 | 9 | 6 | |||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Marbled White | . | . | . | . | . | . | . | . | 1 | 2 | 63 | 100 | 36 | 25 | 1 | 1 | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 15 | 43 | 41 | 20 | 22 | 10 | 3 | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | 4 | 10 | 14 | 46 | 31 | 59 | 156 | 688 | 1746 | 1153 | 980 | 426 | 603 | 268 | 93 | 54 | |||
| Small Heath | . | . | . | . | 1 | 7 | 2 | 22 | 46 | 39 | 72 | 45 | 40 | 30 | 9 | 6 | 1 | 3 | 3 | 2 | 3 | . | . | |||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 10 | 12 | 7 | 7 | . | . | . | . | . | . | . | . | . | |||