
| 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 | . | . | . | . | . | . | . | . | . | 3 | 4 | 4 | 15 | 6 | 4 | 2 | 1 | . | . | . | . | . | . | |||
| Dingy Skipper | . | . | . | . | . | 2 | 12 | 10 | 11 | 7 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | . | 4 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 2 | 7 | . | . | |||
| Large White | . | . | . | . | . | 1 | . | . | . | 1 | 1 | . | . | 3 | 5 | 4 | 3 | 1 | 1 | . | . | . | . | |||
| Small White | . | . | . | 1 | 2 | . | . | . | . | . | . | 1 | . | 1 | . | . | 1 | . | . | . | . | . | . | |||
| Green-veined White | . | . | . | 15 | 22 | 32 | 46 | 23 | 15 | 11 | 6 | 4 | . | 44 | 79 | 111 | 105 | 81 | 25 | 35 | 20 | . | . | |||
| Orange Tip | . | . | 4 | 22 | 37 | 29 | 22 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | . | . | . | 5 | 2 | 5 | 3 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 1 | . | 1 | . | . | 2 | . | . | |||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | . | |||
| Northern Brown Argus | . | . | . | . | . | . | . | . | . | 11 | 39 | 48 | 39 | 45 | 34 | 29 | 8 | 15 | 5 | . | . | . | . | |||
| Common Blue | . | . | . | . | . | . | . | . | 1 | . | . | 2 | 7 | 7 | 2 | 3 | . | . | . | . | 2 | . | . | |||
| Holly Blue | . | 2 | 3 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||
| Red Admiral | . | . | 2 | 1 | . | 2 | . | . | . | . | . | 4 | 2 | 2 | 6 | 12 | 50 | 38 | 63 | 17 | 14 | 6 | 4 | |||
| Painted Lady | . | . | 3 | . | . | . | . | . | . | . | . | . | 1 | . | . | 3 | 11 | 1 | 3 | . | . | . | . | |||
| Small Tortoiseshell | 1 | . | 6 | 3 | 2 | 1 | 1 | . | . | . | . | . | . | . | 6 | 8 | 6 | 4 | 6 | 1 | 1 | 1 | . | |||
| Peacock | 9 | 10 | 16 | 13 | 7 | 12 | 6 | . | 1 | . | . | . | . | . | 1 | . | 11 | 25 | 47 | 36 | 18 | 3 | . | |||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | 2 | . | . | . | |||
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | 3 | 21 | 34 | 68 | 40 | 8 | 5 | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | . | . | . | . | 2 | 5 | 8 | 12 | 15 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | . | . | 6 | 8 | 13 | 6 | 21 | 16 | 11 | 4 | 1 | . | . | . | |||
| Wall Brown | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | 6 | 2 | . | . | |||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 4 | . | 1 | . | . | . | |||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | 8 | 46 | 75 | 151 | 137 | 110 | 113 | 79 | 36 | 13 | 7 | . | . | |||
| Small Heath | . | . | . | . | . | 1 | 5 | 16 | 16 | 12 | 11 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | |||