
| 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 | Ind | ||||||||||||||||||||||||||
| Large Skipper | 41 | . | . | . | . | . | . | . | 2 | 9 | 6 | 16 | 5 | 2 | 1 | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 47 | . | . | . | . | 7 | 12 | 12 | 11 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 28 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | 4 | 3 | 6 | 5 | 3 | |||||
| Large White | 9 | . | . | . | . | . | 1 | 3 | 1 | 1 | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | |||||
| Small White | 3 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | |||||
| Green-veined White | 39 | . | . | 4 | 8 | 1 | 5 | . | . | 1 | 1 | . | 2 | 1 | 3 | 2 | 1 | 1 | 4 | 3 | . | . | |||||
| Orange Tip | 62 | 1 | 12 | 11 | 10 | 22 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 27 | . | 1 | 8 | 11 | 3 | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Northern Brown Argus | 466 | . | . | . | . | . | . | . | 5 | 40 | 60 | 95 | 131 | 59 | 48 | 19 | 8 | 1 | . | . | . | . | |||||
| Common Blue | 34 | . | . | . | . | . | . | . | . | 2 | 2 | 12 | 6 | 4 | 7 | . | . | . | 1 | . | . | . | |||||
| Holly Blue | 8 | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||
| Red Admiral | 501 | 1 | 1 | 1 | . | . | 1 | . | . | . | 2 | . | . | 3 | 12 | 40 | 158 | 136 | 74 | 42 | 4 | 3 | |||||
| Painted Lady | 40 | . | . | . | . | . | . | . | . | . | 4 | 3 | . | . | 1 | 5 | 1 | 3 | 9 | 8 | 1 | 1 | |||||
| Small Tortoiseshell | 38 | . | . | . | . | . | . | . | 1 | . | 1 | . | 2 | 3 | 7 | 6 | 5 | 3 | . | 6 | . | 1 | |||||
| Peacock | 197 | 1 | . | 3 | . | . | . | . | . | . | . | . | . | . | . | 5 | 17 | 47 | 40 | 44 | 9 | 5 | |||||
| Small Pearl-bordered Fritillary | 332 | . | . | . | . | . | . | 20 | 69 | 96 | 101 | 19 | 17 | 6 | 3 | 1 | . | . | . | . | . | . | |||||
| Pearl-bordered Fritillary | 154 | . | . | . | 16 | 39 | 38 | 50 | 6 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | |||||
| High Brown Fritillary | 326 | . | . | . | . | . | . | . | . | . | 1 | 50 | 71 | 87 | 71 | 24 | 16 | 3 | 2 | 1 | . | . | |||||
| Wall Brown | 66 | . | . | . | 1 | 1 | 8 | 5 | 8 | 3 | 1 | . | . | . | . | . | . | 8 | 10 | 6 | 7 | 2 | |||||
| Grayling | 15 | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | 13 | . | . | . | . | . | |||||
| Meadow Brown | 650 | . | . | . | . | . | . | . | . | 1 | 3 | 80 | 126 | 175 | 135 | 61 | 37 | 14 | 7 | 7 | . | . | |||||
| Small Heath | 142 | . | . | . | . | . | 16 | 27 | 19 | 41 | 18 | 12 | 7 | 1 | 1 | . | . | . | . | . | . | . | |||||