
| 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 | ||||||||||||||||||||||||||
| Small Skipper | . | . | . | . | . | . | . | 1 | 10 | 12 | 15 | 7 | 6 | . | . | . | . | |||||||||
| Brimstone | 1 | . | 5 | 1 | 2 | 3 | 5 | . | 1 | . | . | 6 | 3 | 3 | . | 3 | . | |||||||||
| Large White | . | . | . | . | . | 1 | 2 | . | 1 | . | 3 | 4 | 1 | 1 | . | 9 | . | |||||||||
| Small White | . | . | 2 | . | . | 3 | . | . | . | . | . | . | 1 | 9 | 1 | 7 | 1 | |||||||||
| Green-veined White | 1 | . | 2 | . | 4 | 5 | 1 | . | 1 | . | 10 | 31 | 45 | 26 | 12 | 9 | 13 | |||||||||
| Orange Tip | 1 | . | 2 | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | . | . | . | 2 | . | . | . | 4 | 3 | 3 | 8 | 1 | . | 3 | |||||||||
| Brown Argus | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Common Blue | . | . | . | . | 10 | 8 | 7 | 7 | . | . | 2 | 19 | 30 | 35 | 17 | 14 | 1 | |||||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | 3 | . | . | 2 | 3 | 11 | 42 | 9 | |||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 11 | . | |||||||||
| Small Tortoiseshell | . | . | . | 1 | 1 | . | . | 4 | 4 | 1 | . | 1 | 3 | 18 | 11 | 43 | 16 | |||||||||
| Peacock | 6 | 4 | . | . | . | . | . | . | . | . | 4 | 7 | 2 | 10 | 2 | 11 | . | |||||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||||||
| Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | 1 | 3 | 1 | 1 | 3 | . | . | . | . | . | |||||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | 3 | 5 | 2 | 1 | . | . | . | |||||||||
| Speckled Wood | . | 2 | 3 | 1 | . | 3 | 3 | 10 | 5 | . | 6 | 19 | 7 | 11 | 24 | 15 | 13 | |||||||||
| Wall Brown | . | . | . | . | . | 1 | . | . | . | . | . | 2 | . | 4 | 2 | . | . | |||||||||
| Grayling | . | . | . | . | . | . | . | . | . | 2 | 9 | 43 | 56 | 5 | 6 | 4 | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 6 | 81 | 129 | 111 | 152 | 61 | . | |||||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 6 | 9 | 105 | 298 | 361 | 500 | 202 | 144 | 56 | |||||||||
| Small Heath | . | . | . | . | . | 11 | 22 | 5 | 7 | 3 | . | . | . | . | . | 3 | 1 | |||||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 11 | . | 3 | 3 | . | . | . | . | |||||||||