
| 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 | 2 | 5 | 2 | 1 | . | . | . | . | . | ||||||||
| Dingy Skipper | . | . | . | . | 2 | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 12 | 4 | 8 | 5 | 7 | 2 | 2 | 1 | 2 | . | . | . | . | 4 | 16 | 18 | 4 | 11 | ||||||||
| Large White | . | . | . | . | . | 2 | . | 1 | . | . | . | 1 | 2 | 3 | 1 | 1 | . | . | ||||||||
| Small White | . | . | . | . | . | . | 4 | 1 | . | . | . | 2 | 1 | . | 1 | 1 | 1 | . | ||||||||
| Green-veined White | . | 1 | 6 | 13 | 18 | 8 | 7 | 5 | . | . | 13 | 29 | 68 | 61 | 28 | 24 | 15 | 10 | ||||||||
| Orange Tip | . | . | 4 | 16 | 17 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | . | . | 2 | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 6 | . | . | 1 | ||||||||
| Northern Brown Argus | . | . | . | . | . | . | . | 9 | 12 | 48 | 6 | 8 | 6 | 2 | 1 | . | . | . | ||||||||
| Common Blue | . | . | . | . | . | 1 | 1 | . | . | 1 | . | 1 | . | . | . | . | . | . | ||||||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | 1 | 3 | 2 | 2 | . | . | 2 | . | . | ||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | ||||||||
| Small Tortoiseshell | . | 2 | 8 | 7 | 5 | . | . | . | . | . | 17 | 28 | 30 | 17 | 1 | . | 1 | . | ||||||||
| Peacock | 10 | 13 | 27 | 28 | 12 | 7 | . | . | . | 1 | . | . | . | 23 | 63 | 49 | 39 | 13 | ||||||||
| Comma | 2 | . | . | . | . | . | . | . | . | . | 2 | 4 | 12 | 10 | 4 | 1 | 2 | . | ||||||||
| Small Pearl-bordered Fritillary | . | . | . | . | . | 7 | 7 | 5 | . | 3 | . | . | . | . | . | . | . | . | ||||||||
| Pearl-bordered Fritillary | . | . | . | 3 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| High Brown Fritillary | . | . | . | . | . | . | . | 1 | 1 | 8 | 7 | 7 | 7 | 4 | 3 | . | . | 2 | ||||||||
| Speckled Wood | . | . | . | . | 5 | 1 | . | 6 | 10 | 6 | 9 | 12 | 7 | 7 | 12 | 4 | 9 | 3 | ||||||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | ||||||||
| Scotch Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 4 | 14 | 47 | 53 | 60 | 48 | 38 | 29 | 18 | 2 | . | ||||||||
| Small Heath | . | . | . | . | 2 | 7 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||