
| 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 | . | . | . | . | . | . | . | . | . | 11 | 21 | 30 | 24 | 8 | . | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | 3 | 6 | 17 | 8 | 3 | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | 2 | 2 | 1 | 3 | 7 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 2 | 1 | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | ||||||
| Large White | . | . | 1 | 1 | 1 | 2 | 3 | 1 | . | 2 | 1 | 2 | . | 9 | 2 | 2 | . | . | . | . | ||||||
| Small White | . | 1 | . | 1 | . | . | 1 | 1 | 2 | . | 5 | 12 | 14 | 24 | 13 | 26 | 11 | 2 | . | . | ||||||
| Green-veined White | . | . | 2 | 2 | 2 | 5 | 3 | 1 | . | 2 | 5 | 4 | 7 | 7 | 3 | 10 | 4 | 1 | . | . | ||||||
| Orange Tip | . | 1 | 4 | 2 | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 5 | 1 | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | 8 | 18 | 14 | 11 | 8 | 3 | 2 | . | ||||||
| Small Blue | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 14 | 25 | 30 | 21 | 2 | . | . | ||||||
| Common Blue | . | . | . | . | . | . | 1 | 3 | 4 | . | 1 | . | 4 | 19 | 26 | 29 | 18 | 1 | . | . | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| White Admiral | . | . | . | . | . | . | . | . | . | 4 | 7 | 4 | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | 1 | . | . | . | . | . | 2 | . | 1 | . | . | . | . | 1 | 6 | 5 | 4 | ||||||
| Small Tortoiseshell | 2 | . | . | . | . | . | . | 4 | 8 | 9 | 4 | 2 | 3 | 3 | 4 | . | 2 | . | . | . | ||||||
| Peacock | 14 | 20 | 4 | 2 | . | 1 | 2 | . | . | . | . | 32 | 27 | 7 | 4 | . | . | . | . | . | ||||||
| Comma | 6 | 7 | . | . | . | . | . | . | . | 2 | 3 | . | . | . | . | 2 | 2 | 3 | 3 | 3 | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | 1 | 9 | 13 | 12 | 1 | 1 | . | . | . | . | . | ||||||
| Speckled Wood | . | . | . | . | . | 1 | 7 | 5 | 5 | 2 | 2 | 2 | 2 | 4 | 8 | 7 | 8 | 3 | 2 | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 3 | 2 | 1 | 1 | . | . | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 29 | 34 | 57 | 42 | 22 | 8 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 7 | 43 | 41 | 28 | 13 | 17 | 12 | 4 | 1 | . | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 2 | 66 | 115 | 20 | 7 | . | . | . | . | . | . | . | ||||||