
| 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 | . | . | . | . | . | . | . | . | . | 5 | 4 | 2 | . | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | . | . | . | 11 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 2 | 2 | . | . | 4 | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||
| Large White | . | . | . | . | . | . | 2 | . | 12 | 2 | 2 | 2 | 2 | 2 | . | 5 | 3 | 14 | 3 | 3 | ||||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 2 | 4 | 2 | 2 | 4 | 4 | 2 | ||||||
| Green-veined White | . | . | 3 | 7 | 21 | 23 | 24 | 4 | 6 | . | 2 | . | 42 | 29 | 80 | 63 | 121 | 93 | 31 | 17 | ||||||
| Orange Tip | 2 | 1 | 6 | 21 | 17 | 15 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 3 | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Northern Brown Argus | . | . | . | . | . | . | . | . | 2 | 4 | 3 | 9 | 5 | 5 | 4 | 5 | . | . | . | . | ||||||
| Common Blue | . | . | . | . | . | . | . | 3 | 8 | 2 | 4 | 3 | 2 | 1 | . | 2 | 1 | 4 | 1 | 2 | ||||||
| Holly Blue | . | 1 | 3 | 2 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||||
| Red Admiral | 2 | 1 | . | . | . | . | . | . | . | . | . | . | 7 | . | 1 | . | . | . | . | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | 1 | ||||||
| Small Tortoiseshell | 38 | 51 | 25 | 17 | 16 | 8 | 1 | 2 | . | . | . | . | 18 | 4 | 34 | 21 | 24 | 39 | . | . | ||||||
| Peacock | 35 | 32 | 32 | 22 | 23 | 25 | 6 | 3 | . | . | . | . | . | . | 13 | 36 | 120 | 129 | 55 | 19 | ||||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | 21 | 26 | 17 | 5 | 2 | . | . | . | . | . | . | . | ||||||
| Pearl-bordered Fritillary | . | . | . | . | . | 1 | 19 | 21 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | . | 3 | 5 | 7 | 7 | 8 | 3 | 1 | 1 | . | . | ||||||
| Speckled Wood | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Wall Brown | . | . | . | . | . | . | . | . | 5 | . | . | . | . | . | . | 5 | 4 | 4 | 9 | 3 | ||||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 15 | 66 | 215 | 238 | 159 | 152 | 89 | 48 | 25 | 15 | . | ||||||
| Small Heath | . | . | . | . | . | 1 | 33 | 24 | 8 | 1 | 5 | 5 | . | . | . | . | . | . | . | . | ||||||