
| 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 | 5 | 6 | 1 | 1 | . | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | . | 4 | 2 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 3 | . | 6 | 3 | 2 | 7 | 2 | . | . | 3 | . | 1 | 1 | . | . | . | . | . | 2 | 5 | 11 | 14 | 1 | |||
| Large White | . | . | . | . | 2 | 4 | 6 | 9 | 6 | 7 | 2 | 2 | 2 | 2 | . | . | 5 | 7 | 9 | 18 | 8 | 2 | . | |||
| Small White | . | . | . | 1 | . | 2 | . | . | . | 1 | 3 | . | 2 | 1 | . | . | 3 | 7 | 4 | 4 | 6 | 2 | . | |||
| Green-veined White | . | . | . | 3 | 10 | 30 | 65 | 63 | 18 | 56 | 7 | . | . | 23 | 27 | 107 | 206 | 145 | 145 | 73 | 109 | 13 | 3 | |||
| Orange Tip | . | . | . | 2 | 14 | 17 | 26 | 16 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | . | 1 | 1 | 2 | . | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 2 | 3 | 1 | . | |||
| Small Copper | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||
| Brown Argus | . | . | . | . | . | . | . | . | 2 | . | 18 | 24 | 12 | 8 | 11 | . | . | . | . | . | . | . | . | |||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | 1 | . | . | . | . | . | |||
| Holly Blue | . | . | . | . | 1 | 2 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 1 | 2 | 4 | 10 | 8 | 17 | |||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 3 | . | . | . | 5 | 4 | 103 | 24 | 14 | 4 | . | |||
| Small Tortoiseshell | 8 | 22 | 43 | 25 | 21 | 7 | 11 | 4 | . | . | 1 | 14 | 14 | 15 | 20 | 23 | 36 | 18 | 38 | 16 | 8 | . | 11 | |||
| Peacock | 3 | 10 | 22 | 24 | 28 | 21 | 19 | 20 | 2 | 2 | 1 | . | . | . | 1 | . | 3 | 40 | 102 | 43 | 32 | 7 | 2 | |||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | 12 | 35 | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | . | . | . | . | . | 1 | 20 | 16 | 15 | 16 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | . | . | 4 | 11 | 11 | 3 | 4 | 3 | 2 | 4 | . | . | . | . | |||
| Wall Brown | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | 1 | . | . | 5 | 1 | 5 | . | 2 | . | |||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | 3 | 14 | 26 | 69 | 36 | 35 | 43 | 4 | 7 | . | 2 | . | . | |||
| Small Heath | . | . | . | . | . | 1 | 8 | 6 | 8 | 16 | 2 | 2 | 2 | . | . | . | . | . | . | . | . | 1 | . | |||