
| 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 | . | . | . | . | . | . | . | 3 | . | 32 | 113 | 188 | 271 | 146 | 89 | 38 | 13 | 2 | . | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | 30 | 37 | 3 | 8 | 5 | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | 1 | 3 | 3 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | ||||
| Brimstone | 3 | 9 | 15 | 12 | 22 | 7 | 16 | 10 | 3 | . | . | 1 | 13 | 35 | 46 | 47 | 6 | 8 | 36 | 9 | 5 | . | ||||
| Large White | . | . | . | 3 | 3 | 1 | 1 | 3 | 2 | . | . | 3 | 10 | 18 | 21 | 10 | 4 | 12 | 1 | . | . | . | ||||
| Small White | . | 1 | 3 | 13 | 5 | 15 | 8 | 3 | 5 | 3 | 1 | 2 | 35 | 61 | 68 | 77 | 42 | 35 | 48 | 35 | 48 | 11 | ||||
| Green-veined White | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 6 | 2 | . | . | 2 | . | . | . | ||||
| Orange Tip | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | . | . | 2 | 2 | 1 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | 1 | 4 | 2 | 6 | 6 | 10 | . | . | 3 | 8 | 11 | 9 | 14 | 16 | 11 | 3 | 15 | 31 | 25 | 16 | ||||
| Brown Argus | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | . | . | 4 | 5 | 8 | 3 | 3 | . | . | . | ||||
| Common Blue | . | . | . | 1 | 1 | 7 | 7 | 15 | 7 | . | . | 1 | 1 | 16 | 46 | 47 | 35 | 10 | 9 | . | . | . | ||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | ||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 1 | . | . | . | . | . | . | . | . | ||||
| Red Admiral | . | 1 | 1 | . | . | 2 | . | 1 | 1 | 1 | . | 1 | 3 | 7 | 2 | 2 | 2 | 3 | 6 | 2 | 3 | 7 | ||||
| Painted Lady | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | 2 | 2 | 1 | 3 | 1 | 5 | 3 | . | ||||
| Small Tortoiseshell | 1 | 5 | . | 1 | . | . | . | . | 21 | 13 | 8 | 5 | 4 | 4 | 16 | 22 | 14 | 32 | 35 | 12 | 9 | 2 | ||||
| Peacock | 2 | . | 4 | 5 | 3 | . | 1 | . | . | . | . | . | 2 | 6 | 10 | 2 | . | 2 | 4 | 2 | . | 1 | ||||
| Comma | 3 | 2 | 5 | 1 | 2 | . | 1 | . | . | 5 | 3 | 4 | 4 | 3 | 2 | 2 | . | . | . | 2 | 2 | 1 | ||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 3 | 1 | 4 | 1 | . | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | . | 1 | 6 | 5 | 6 | 5 | 16 | 18 | 9 | 7 | 12 | 10 | 9 | 8 | 15 | 13 | 10 | 10 | 18 | 16 | 2 | ||||
| Wall Brown | . | . | . | . | . | 2 | 3 | 5 | . | . | . | . | . | 1 | 21 | 41 | 29 | 23 | . | . | . | . | ||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 95 | 173 | 170 | 164 | 79 | 30 | 1 | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 5 | 44 | 57 | 67 | 139 | 242 | 320 | 378 | 381 | 235 | 90 | 46 | 28 | 1 | ||||
| Small Heath | . | . | . | 4 | 14 | 34 | 27 | 42 | 29 | 19 | 13 | 26 | 17 | 9 | 14 | 22 | 46 | 25 | 8 | 9 | 5 | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | 17 | 104 | 99 | 79 | 26 | 5 | . | . | . | . | . | . | . | ||||