
| 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 | . | . | . | . | . | . | 3 | . | 8 | 3 | 1 | 2 | 1 | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | 11 | 10 | 10 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | 3 | 2 | . | . | ||||||
| Large White | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | 1 | . | 5 | 5 | 2 | 1 | 4 | ||||||
| Small White | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 3 | 2 | 2 | 2 | ||||||
| Green-veined White | . | 3 | 17 | 32 | 26 | 13 | 19 | 27 | . | 3 | . | 7 | 25 | 61 | 58 | 62 | 54 | 29 | 16 | 11 | ||||||
| Orange Tip | . | 22 | 39 | 28 | 18 | 4 | 1 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 2 | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | . | . | . | . | 4 | 18 | 9 | 15 | 16 | 11 | 14 | 1 | . | . | . | . | . | ||||||
| Common Blue | . | . | . | . | . | 1 | 8 | 3 | 4 | 3 | . | 8 | 1 | . | 2 | 3 | 4 | 6 | 1 | . | ||||||
| Holly Blue | . | 3 | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||
| Red Admiral | 2 | . | . | . | . | . | 1 | . | . | 4 | 2 | 5 | 2 | 6 | 3 | 2 | 2 | 2 | 4 | 8 | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | 8 | 5 | 1 | ||||||
| Small Tortoiseshell | 24 | 38 | 27 | 17 | 11 | 3 | . | 6 | 14 | 22 | 42 | 93 | 42 | 170 | 75 | 14 | 9 | 15 | 16 | 4 | ||||||
| Peacock | 16 | 51 | 31 | 17 | 14 | 5 | 1 | 5 | . | 3 | . | . | . | 8 | 127 | 114 | 137 | 82 | 28 | 4 | ||||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | 37 | 13 | 7 | 9 | 4 | 2 | . | . | . | . | . | . | . | . | ||||||
| Pearl-bordered Fritillary | . | . | . | 12 | 7 | 15 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 1 | . | 5 | 8 | 3 | 4 | 4 | 2 | . | . | . | ||||||
| Wall Brown | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | 8 | 13 | 8 | 7 | . | ||||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 2 | 11 | 119 | 222 | 167 | 139 | 136 | 56 | 32 | 6 | 4 | . | . | ||||||
| Small Heath | . | . | . | 5 | 5 | 47 | 7 | 12 | 12 | 7 | 3 | . | . | . | . | . | . | . | . | . | ||||||