
| 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 | ||||||||||||||||||||||||||
| Large Skipper | . | . | . | . | . | . | 2 | 4 | 16 | 44 | 26 | 38 | 20 | 4 | 2 | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | 6 | 24 | 22 | 40 | 8 | 2 | 4 | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | ||||||
| Large White | . | . | 8 | 2 | 28 | 56 | 30 | 28 | 30 | 2 | . | 6 | 6 | 14 | 36 | 74 | 58 | 38 | 20 | 12 | ||||||
| Small White | . | . | . | . | . | 2 | . | 2 | 4 | 2 | . | . | . | 8 | 22 | 102 | 20 | 8 | 2 | . | ||||||
| Green-veined White | . | . | 2 | . | 6 | . | . | . | . | . | . | . | 2 | 30 | 26 | 34 | 4 | 10 | 4 | 2 | ||||||
| Orange Tip | . | . | 10 | 12 | 18 | 12 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | 2 | 18 | 40 | 20 | 14 | 6 | . | 6 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 6 | 2 | 2 | 4 | . | ||||||
| Northern Brown Argus | . | . | . | . | . | . | 2 | 20 | 68 | 112 | 186 | 266 | 202 | 184 | 116 | 120 | 48 | 10 | . | . | ||||||
| Common Blue | . | . | . | . | . | . | 10 | . | 14 | 10 | 4 | 8 | 6 | . | 6 | 22 | 24 | 10 | 14 | . | ||||||
| Holly Blue | . | . | 4 | . | 16 | 6 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 2 | 8 | 2 | 4 | . | 14 | 4 | 46 | 28 | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 6 | 20 | 4 | . | ||||||
| Small Tortoiseshell | 2 | 2 | . | . | 6 | . | . | . | . | . | 18 | 52 | 66 | 8 | 6 | 4 | 6 | 6 | 6 | 16 | ||||||
| Peacock | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 30 | 14 | . | 4 | . | ||||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | 96 | 106 | 84 | 18 | 30 | . | . | . | . | . | . | . | . | ||||||
| Pearl-bordered Fritillary | . | . | 4 | 24 | 24 | 50 | 136 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 10 | 44 | 82 | 78 | 22 | 24 | 12 | . | . | . | . | ||||||
| Wall Brown | . | . | . | 6 | 2 | 2 | 12 | 2 | . | . | . | . | . | . | 4 | 22 | 70 | 38 | 36 | . | ||||||
| Grayling | . | . | . | . | . | . | . | . | . | 4 | 6 | 12 | 20 | 16 | 4 | 4 | 4 | . | 2 | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 6 | 74 | 70 | 110 | 88 | 64 | 38 | 8 | 2 | . | . | ||||||
| Small Heath | . | . | . | . | 8 | 32 | 94 | 76 | 30 | 48 | 24 | 18 | 14 | 4 | 2 | 10 | 8 | 6 | 2 | . | ||||||