
| 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 | . | . | . | . | . | . | . | 1 | 2 | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | 3 | 9 | 14 | 11 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 6 | 9 | 4 | 4 | 4 | 2 | . | 2 | 2 | . | . | . | 1 | 1 | 4 | 9 | 8 | 8 | 5 | . | . | |||||
| Large White | . | . | 1 | 2 | 1 | . | . | 2 | . | . | . | 1 | 1 | . | 3 | 2 | 3 | 1 | . | . | . | |||||
| Small White | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | 2 | . | 1 | 1 | . | 1 | . | . | |||||
| Green-veined White | . | 3 | 26 | 20 | 26 | 17 | 16 | . | . | 1 | 5 | 11 | 17 | 38 | 20 | 13 | 2 | 5 | . | 1 | . | |||||
| Orange Tip | . | 2 | 28 | 19 | 26 | 10 | 10 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | 5 | 6 | 7 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | |||||
| Northern Brown Argus | . | . | . | . | . | . | . | 18 | 17 | 14 | 19 | 5 | 4 | 9 | . | 3 | . | . | . | . | . | |||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||
| Red Admiral | 1 | . | . | . | . | . | . | 1 | . | . | . | . | 2 | 4 | 3 | 2 | 1 | . | 2 | 3 | 5 | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | |||||
| Small Tortoiseshell | 7 | 4 | 12 | 15 | 11 | 8 | . | 2 | 1 | . | 10 | 3 | 5 | 10 | 8 | 3 | . | 1 | 2 | 4 | 8 | |||||
| Peacock | 16 | 8 | 25 | 21 | 12 | 5 | 3 | . | . | . | . | . | . | 3 | 30 | 28 | 16 | 6 | . | 1 | 2 | |||||
| Comma | 3 | . | . | . | . | . | . | . | . | . | 2 | 4 | 3 | 2 | 2 | . | . | . | 2 | 6 | 3 | |||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | 3 | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | |||||
| Pearl-bordered Fritillary | . | . | 3 | 13 | 11 | 11 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| High Brown Fritillary | . | . | . | . | . | . | . | 1 | 2 | 4 | 17 | 12 | 1 | 4 | 5 | 6 | . | . | . | . | . | |||||
| Speckled Wood | . | . | 1 | 4 | 3 | 1 | 1 | 12 | 6 | 2 | 3 | 8 | . | 13 | 9 | 6 | 9 | 10 | 10 | 11 | 13 | |||||
| Wall Brown | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | 2 | 2 | 5 | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 3 | 20 | 47 | 42 | 23 | 46 | 32 | 11 | 6 | . | . | . | . | |||||
| Small Heath | . | . | . | 1 | 12 | 15 | 14 | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||