
| 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 | 4 | 3 | 1 | 3 | . | . | . | . | . | . | |||||||
| Dingy Skipper | . | . | . | . | 1 | 8 | 5 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | 9 | 19 | 13 | 6 | 26 | 14 | 6 | 7 | 2 | . | . | 3 | . | . | . | 4 | 24 | 18 | 17 | |||||||
| Large White | . | . | 1 | 7 | 17 | 4 | 3 | 2 | 1 | . | 2 | 2 | 4 | . | 11 | 12 | 16 | 10 | 1 | |||||||
| Small White | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green-veined White | . | 1 | 41 | 28 | 88 | 54 | 40 | 48 | 11 | 5 | 2 | 6 | 26 | 68 | 208 | 204 | 111 | 78 | 39 | |||||||
| Orange Tip | . | . | 30 | 14 | 40 | 29 | 11 | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 9 | 3 | 7 | 7 | 9 | |||||||
| Small Copper | . | . | . | . | 1 | 3 | 1 | 1 | . | . | . | . | . | 1 | 17 | 12 | 6 | . | 4 | |||||||
| Brown Argus | . | . | . | . | . | . | . | . | 10 | 8 | 6 | 11 | 9 | 11 | 2 | 1 | . | . | . | |||||||
| Common Blue | . | . | . | . | . | . | 3 | 9 | 7 | 3 | 1 | 2 | . | . | 2 | 7 | 8 | 5 | 9 | |||||||
| Holly Blue | . | . | 2 | 2 | 4 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | 2 | . | . | . | . | . | . | . | 6 | 5 | 24 | 1 | 2 | . | . | |||||||
| Small Tortoiseshell | 6 | 14 | 38 | 21 | 31 | 28 | 4 | 2 | . | 1 | 5 | 16 | 25 | 12 | 33 | 10 | 9 | 1 | 8 | |||||||
| Peacock | 17 | 32 | 34 | 49 | 65 | 82 | 19 | 17 | . | . | 3 | . | . | 4 | 11 | 48 | 24 | 9 | 2 | |||||||
| Small Pearl-bordered Fritillary | . | . | . | 15 | . | . | . | 7 | 3 | 4 | . | . | . | . | . | . | . | . | . | |||||||
| Pearl-bordered Fritillary | . | . | . | . | 20 | 22 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | 3 | 12 | 17 | 12 | 11 | 14 | 20 | 5 | . | . | |||||||
| Wall Brown | . | . | . | . | . | . | 8 | 1 | . | . | . | . | 1 | . | . | . | 12 | 25 | 42 | |||||||
| Grayling | . | . | . | . | . | 2 | . | . | . | . | . | . | . | 2 | . | 2 | 1 | 2 | 1 | |||||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 20 | 75 | 147 | 189 | 229 | 230 | 221 | 58 | 32 | 2 | |||||||
| Small Heath | . | . | . | 4 | 6 | 15 | 19 | 20 | 9 | . | 5 | . | 4 | . | . | . | 2 | 2 | 1 | |||||||