
| 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 | . | . | . | . | . | . | . | . | . | . | . | 8 | 69 | 56 | 102 | 73 | 4 | 6 | 2 | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | 1 | 19 | 12 | 20 | 21 | . | 2 | 6 | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | 3 | 11 | 12 | 8 | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | . | 7 | 10 | 4 | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 4 | 3 | 2 | . | 2 | 3 | . | 1 | . | |||
| Brimstone | . | 3 | 13 | 12 | 12 | 5 | 18 | 20 | 8 | . | . | . | 1 | 2 | 4 | 9 | . | 4 | 4 | . | 10 | . | . | |||
| Large White | . | . | . | . | . | . | . | . | 2 | . | 1 | . | 2 | 5 | 4 | 3 | 5 | 17 | 7 | . | . | . | . | |||
| Small White | . | . | . | . | . | 4 | 9 | 1 | . | 3 | . | 3 | 10 | 18 | 16 | 69 | 47 | 71 | 30 | . | 2 | . | . | |||
| Green-veined White | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | 1 | 1 | 5 | 1 | 1 | . | . | . | . | |||
| Orange Tip | . | . | 4 | 1 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | . | . | . | . | 1 | . | 2 | 1 | 1 | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | |||
| Small Blue | . | . | . | . | . | . | 3 | 2 | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | |||
| Brown Argus | . | . | . | . | . | . | 3 | 2 | . | . | . | . | . | . | . | 1 | . | 6 | 4 | 1 | 3 | . | . | |||
| Common Blue | . | . | . | . | . | . | 3 | 18 | 15 | 9 | 4 | . | . | . | 1 | 4 | 2 | 16 | 27 | 4 | 10 | 1 | . | |||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 12 | 24 | 18 | 22 | 7 | . | . | . | . | |||
| Adonis Blue | . | . | . | . | . | . | . | 7 | 8 | 1 | 4 | . | . | . | . | . | . | 2 | . | 2 | 3 | . | . | |||
| Holly Blue | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 3 | . | . | . | . | . | 1 | . | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 1 | |||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 3 | 3 | . | . | . | 1 | 3 | 2 | 1 | 1 | 1 | |||
| Peacock | . | 3 | . | 4 | . | . | . | . | . | . | . | . | 2 | 5 | 11 | 16 | . | . | 1 | . | . | . | . | |||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | 4 | 3 | 4 | . | 1 | . | . | . | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | . | . | . | . | . | . | |||
| Speckled Wood | . | . | . | 1 | 2 | 1 | 3 | 1 | 2 | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||
| Marbled White | . | . | . | . | . | . | . | . | . | 40 | 47 | 123 | 80 | 30 | 23 | 11 | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 4 | 17 | 22 | 23 | 31 | 15 | 13 | 14 | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | 1 | 29 | 21 | 76 | 56 | 66 | 101 | 177 | 108 | 221 | 152 | 15 | 30 | 4 | . | |||
| Small Heath | . | . | . | . | 5 | 4 | 7 | 15 | 25 | 15 | 13 | 4 | 5 | . | . | 2 | . | 3 | 2 | . | 2 | . | . | |||
| Ringlet | . | . | . | . | . | . | . | . | . | 21 | 16 | 46 | 11 | 6 | 4 | 6 | . | . | . | . | . | . | . | |||