
| 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 | . | . | . | . | . | . | . | . | . | . | 4 | . | 24 | 46 | 84 | 66 | 26 | . | . | . | . | . | . | |||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | 12 | 22 | 36 | 16 | 8 | 4 | 2 | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | . | . | . | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | . | . | . | . | . | 10 | 4 | . | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Wood White | . | . | . | . | . | . | 2 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | |||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | 4 | 2 | 2 | . | |||
| Brimstone | . | . | . | 2 | . | 2 | 2 | 6 | 4 | 6 | . | . | . | . | . | 8 | 12 | 6 | . | 2 | . | . | . | |||
| Large White | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | 4 | 2 | 2 | . | 2 | . | . | . | 14 | |||
| Small White | . | . | . | 2 | . | . | . | 8 | . | 2 | . | . | . | . | 8 | 4 | 22 | 8 | 36 | 16 | 14 | 44 | . | |||
| Green-veined White | . | . | . | 4 | 6 | 8 | 4 | . | . | 2 | . | . | . | 8 | . | 36 | 10 | 2 | 2 | . | . | . | . | |||
| Orange Tip | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 4 | . | 2 | . | . | . | . | |||
| Small Copper | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | 16 | . | 2 | . | 4 | 4 | . | . | |||
| Common Blue | . | . | . | . | . | . | 2 | 2 | 12 | 22 | 14 | 2 | 6 | . | 4 | 28 | 46 | 132 | 84 | 52 | 2 | . | . | |||
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 4 | 4 | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | 2 | . | . | 2 | . | 4 | . | . | 6 | 14 | 6 | 12 | 18 | 12 | 22 | 34 | 30 | |||
| Painted Lady | . | . | . | . | . | 4 | . | 2 | 2 | 2 | 4 | . | 8 | 4 | 10 | 6 | 30 | 54 | 126 | 108 | 10 | 48 | 44 | |||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 2 | . | 10 | 22 | 54 | 48 | 18 | . | . | . | |||
| Peacock | 22 | 2 | 22 | 6 | . | . | . | 2 | . | . | . | . | . | . | 4 | 72 | 104 | 46 | 2 | 12 | 4 | . | . | |||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 8 | 10 | 4 | 6 | 6 | 8 | 32 | 18 | |||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | 42 | 28 | 22 | . | 4 | . | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | . | . | . | 22 | 44 | 94 | 82 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | 2 | 8 | 30 | 30 | 18 | 8 | 22 | 10 | 6 | . | . | . | |||
| Speckled Wood | . | . | 2 | 6 | 2 | 6 | 6 | 14 | 12 | 18 | 8 | 12 | . | 2 | 4 | 18 | 32 | 70 | 160 | 86 | 44 | 40 | 20 | |||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 2 | |||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 2 | 28 | 78 | 48 | 8 | . | . | . | . | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 54 | 342 | 368 | 132 | 140 | 8 | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 2 | 28 | 46 | 104 | 178 | 238 | 196 | 148 | 120 | 160 | 38 | . | . | . | |||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 2 | 22 | 226 | 272 | 270 | 64 | 10 | 2 | . | . | . | . | . | |||