
| 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 | 16 | 5 | 4 | 1 | 1 | 1 | . | . | . | . | . | |||||||||
| Dingy Skipper | . | . | . | 12 | 11 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | 3 | 5 | 4 | 11 | 4 | 1 | . | |||||||||
| Brimstone | 1 | 1 | 1 | . | . | 2 | . | . | . | . | . | . | . | 3 | 8 | 8 | 6 | |||||||||
| Large White | . | . | 3 | 7 | 19 | 3 | 4 | 6 | 2 | 8 | 6 | 13 | 9 | 7 | 2 | 1 | 4 | |||||||||
| Small White | . | . | . | . | . | 2 | 1 | . | . | . | 1 | 3 | . | 4 | 4 | 4 | . | |||||||||
| Green-veined White | . | 5 | 30 | 29 | 30 | 18 | 4 | . | 3 | 30 | 59 | 94 | 59 | 102 | 81 | 28 | 23 | |||||||||
| Orange Tip | . | 8 | 15 | 8 | . | 3 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 4 | 2 | 4 | 4 | 1 | . | |||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Northern Brown Argus | . | . | . | . | . | 8 | 18 | 22 | 26 | 10 | 10 | 3 | . | 1 | . | . | . | |||||||||
| Common Blue | . | . | . | 3 | 3 | 1 | 2 | 1 | 8 | 2 | 1 | . | . | 7 | 9 | 7 | . | |||||||||
| Holly Blue | . | 1 | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | |||||||||
| Red Admiral | . | . | . | 2 | 1 | . | . | 1 | . | . | 7 | 10 | 12 | 5 | 14 | 6 | 5 | |||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | . | 4 | 8 | 2 | |||||||||
| Small Tortoiseshell | 16 | 7 | 10 | 9 | 2 | 2 | . | . | 3 | 18 | 96 | 89 | 19 | 16 | 3 | 1 | . | |||||||||
| Peacock | 14 | 22 | 36 | 31 | 9 | 2 | . | . | . | . | . | . | 47 | 45 | 51 | 38 | 16 | |||||||||
| Small Pearl-bordered Fritillary | . | . | . | . | 2 | 31 | 33 | 19 | 9 | 1 | . | . | . | . | . | . | . | |||||||||
| Pearl-bordered Fritillary | . | . | 5 | 15 | 18 | 5 | 9 | . | . | . | . | . | . | . | . | . | . | |||||||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | 10 | 16 | 8 | 9 | 6 | 3 | 3 | . | . | |||||||||
| Wall Brown | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | 1 | 2 | 12 | 8 | |||||||||
| Grayling | . | . | . | . | . | . | . | . | . | 2 | 5 | 3 | . | . | 2 | . | . | |||||||||
| Meadow Brown | . | . | . | . | . | . | 14 | 42 | 133 | 239 | 93 | 93 | 57 | 48 | 24 | 8 | 1 | |||||||||
| Small Heath | . | . | . | 10 | 13 | 28 | 9 | 4 | . | . | . | . | . | . | . | . | . | |||||||||