
| 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 | 33 | 59 | 3 | 8 | 7 | 8 | . | . | . | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | 1 | 28 | 20 | 12 | 18 | 7 | . | 1 | 1 | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | . | . | . | 4 | 3 | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Wood White | . | . | . | . | . | 14 | 38 | 30 | 18 | 6 | 7 | 2 | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 7 | 4 | . | . | 2 | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | 2 | . | . | 3 | 1 | ||||
| Large White | . | 1 | 1 | . | 2 | 8 | 3 | 4 | 2 | . | 4 | 7 | 8 | 19 | 12 | 10 | 9 | 1 | 1 | 2 | 3 | . | ||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 10 | 2 | 1 | 4 | 2 | . | 4 | . | . | ||||
| Green-veined White | . | . | . | 7 | 13 | . | 1 | 4 | 3 | . | . | 3 | . | 4 | 11 | 5 | 7 | 2 | . | 2 | . | . | ||||
| Orange Tip | . | . | 3 | 3 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brown Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||
| Black Hairstreak | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Common Blue | . | . | . | . | . | . | 2 | 7 | 4 | 1 | 1 | . | . | . | . | 3 | 4 | 3 | 2 | 1 | . | . | ||||
| Holly Blue | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | . | . | . | . | . | . | . | . | . | 1 | 9 | 11 | . | 4 | 4 | 3 | . | . | . | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | 3 | 1 | . | 1 | 1 | . | . | . | ||||
| Small Tortoiseshell | . | 1 | . | . | . | 1 | . | . | . | . | 1 | 3 | 1 | 1 | 1 | . | . | . | 6 | 1 | . | . | ||||
| Peacock | 3 | 9 | 5 | 1 | 9 | 3 | . | 1 | . | . | . | . | 1 | 2 | 29 | 6 | 4 | 3 | 2 | 2 | 2 | . | ||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | 1 | 1 | 1 | . | 2 | 3 | 7 | 2 | 1 | 5 | 1 | . | 1 | 1 | 1 | 5 | 29 | 23 | 10 | 6 | 1 | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | 2 | 19 | 80 | 8 | 13 | 5 | 4 | 1 | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 18 | 28 | 26 | 29 | 2 | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | 3 | 10 | 20 | 77 | 41 | 71 | 79 | 73 | 68 | 38 | 3 | . | . | . | . | ||||
| Small Heath | . | . | . | . | . | 1 | 1 | 4 | 6 | 1 | 1 | . | . | . | . | . | . | 1 | . | . | . | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | 1 | 48 | 132 | 57 | 82 | 17 | 11 | 6 | . | . | . | . | . | ||||