
| 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 | 7 | 11 | 7 | 4 | 1 | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | 3 | 1 | . | 7 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 1 | 2 | 1 | . | . | . | 1 | 1 | 2 | 2 | . | . | . | . | . | . | . | 1 | . | 6 | 4 | 6 | 2 | |||
| Large White | . | . | . | 1 | 9 | 2 | 11 | 20 | 13 | 9 | 8 | 4 | 2 | 3 | 10 | 6 | 4 | 45 | 48 | 62 | 34 | 11 | 7 | |||
| Small White | . | . | . | . | 7 | 10 | 7 | 4 | 5 | 1 | 1 | 1 | . | . | 1 | 3 | 7 | 10 | 19 | 43 | 13 | 11 | . | |||
| Green-veined White | . | . | . | 4 | . | 18 | 32 | 32 | 33 | 20 | 7 | 3 | . | 22 | 44 | 112 | 106 | 138 | 66 | 11 | . | . | . | |||
| Orange Tip | . | . | . | 2 | 14 | 26 | 13 | 7 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | 1 | 3 | 4 | . | . | |||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | . | 3 | 2 | 1 | . | |||
| Brown Argus | . | . | . | . | . | . | . | . | 6 | 14 | 30 | 29 | 13 | 30 | 8 | 2 | 3 | 5 | . | 2 | . | . | . | |||
| Common Blue | . | . | . | . | 1 | 1 | . | . | . | 4 | 6 | 6 | 3 | 11 | 1 | . | . | 3 | . | . | 1 | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 7 | 4 | 2 | 1 | 1 | 2 | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 5 | . | . | . | . | . | |||
| Small Tortoiseshell | . | 5 | 18 | 6 | 6 | 1 | 2 | 1 | . | . | . | 3 | 5 | 6 | 15 | 15 | 7 | 12 | 12 | 5 | . | 1 | 3 | |||
| Peacock | 4 | 10 | 11 | 9 | 12 | 7 | 4 | 2 | . | . | 1 | . | . | . | . | . | 13 | 16 | 24 | 31 | 13 | 4 | 2 | |||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | 23 | 12 | 10 | 7 | 4 | 2 | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | . | . | . | . | . | 4 | 4 | 4 | 9 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | . | . | 9 | 8 | 9 | 14 | 6 | 4 | 6 | 1 | . | . | . | . | |||
| Wall Brown | . | . | . | . | . | . | . | . | 1 | 3 | 2 | 2 | 1 | . | . | . | . | . | . | 2 | 4 | 10 | 12 | |||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 1 | 1 | 6 | 2 | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | 25 | 100 | 65 | 97 | 85 | 36 | 32 | 21 | 2 | 1 | . | . | . | |||
| Small Heath | . | . | . | . | . | . | 4 | 7 | 24 | 6 | 8 | 4 | . | 1 | . | . | . | . | . | 3 | 3 | . | . | |||
| Unknown White | . | . | . | . | . | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||