
| 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 | 5 | 2 | 4 | . | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | . | . | . | . | . | . | 7 | 4 | . | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | ||||
| Brimstone | 1 | 1 | 8 | 8 | 6 | 4 | 4 | 1 | 1 | . | 1 | 1 | . | . | 1 | 9 | 9 | 24 | 8 | 5 | . | . | ||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 5 | . | 1 | 4 | 6 | . | . | . | . | ||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 1 | 1 | . | . | ||||
| Green-veined White | . | . | 2 | 1 | 8 | 37 | 23 | 6 | 8 | 6 | . | 2 | 16 | 44 | 32 | 32 | 17 | 18 | 10 | 7 | 1 | . | ||||
| Orange Tip | . | . | . | 2 | 13 | 17 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | . | . | . | 3 | 3 | 24 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | ||||
| Northern Brown Argus | . | . | . | . | . | . | . | 4 | 12 | 40 | 26 | 54 | . | 2 | . | . | . | . | . | . | . | . | ||||
| Common Blue | . | . | . | . | . | . | 1 | . | 2 | 3 | 3 | 4 | . | . | . | . | . | . | . | . | . | . | ||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | . | 2 | 1 | 3 | 2 | . | . | 5 | 1 | . | 9 | 3 | 9 | 12 | 7 | ||||
| Painted Lady | . | . | . | . | . | . | . | . | . | 2 | 4 | 2 | 1 | . | . | . | 2 | 2 | 2 | 5 | 1 | . | ||||
| Small Tortoiseshell | 1 | . | . | 2 | 6 | 2 | . | . | . | . | . | . | 6 | 6 | 2 | 2 | . | . | . | . | 1 | 3 | ||||
| Peacock | 8 | 9 | 17 | 12 | 34 | 19 | 2 | 4 | . | . | . | . | . | . | 14 | 50 | 40 | 39 | 7 | 2 | . | . | ||||
| Comma | 1 | 7 | . | 4 | 2 | . | . | . | . | . | . | . | 4 | 3 | 1 | 4 | 1 | 9 | . | . | . | 4 | ||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | 2 | 13 | 23 | 18 | 8 | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Pearl-bordered Fritillary | . | . | . | . | . | 1 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 2 | 5 | 15 | 13 | 7 | 5 | . | . | . | . | . | . | . | ||||
| Speckled Wood | . | . | . | 3 | . | 11 | 2 | 1 | 7 | 12 | 14 | 10 | 9 | 6 | 17 | 21 | 34 | 13 | 10 | 6 | 15 | 32 | ||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 2 | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 13 | 74 | 152 | 115 | 46 | 39 | 10 | 9 | 2 | . | . | . | . | ||||
| Small Heath | . | . | . | . | . | 2 | 6 | 4 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||