
| 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 | . | . | . | . | . | . | 2 | 5 | 8 | 21 | 87 | 50 | 44 | 17 | . | . | . | |||||||||
| Large Skipper | . | . | . | . | 3 | 7 | 16 | 20 | 8 | 4 | 3 | 1 | 2 | . | . | . | . | |||||||||
| Wood White | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 14 | 5 | . | . | 1 | 1 | . | . | . | . | 5 | 17 | 15 | 1 | . | 2 | . | |||||||||
| Large White | . | 2 | . | . | 1 | . | . | . | . | 2 | 19 | 11 | 23 | 2 | 2 | 1 | 1 | |||||||||
| Small White | . | 4 | . | . | . | 1 | . | . | . | 4 | 7 | 10 | 6 | 4 | 4 | 13 | . | |||||||||
| Green-veined White | 1 | 1 | . | . | 3 | . | . | . | . | . | 2 | 2 | 5 | . | 1 | . | . | |||||||||
| Orange Tip | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 11 | 1 | . | 2 | |||||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | |||||||||
| Common Blue | . | . | . | . | 24 | 21 | . | 1 | . | 1 | . | 5 | 26 | 97 | 27 | 2 | . | |||||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Red Admiral | . | . | . | . | . | 2 | . | . | . | . | . | 1 | . | 2 | 9 | 20 | . | |||||||||
| Painted Lady | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | |||||||||
| Small Tortoiseshell | 1 | . | . | . | . | . | 1 | . | . | 2 | 2 | . | . | 1 | 3 | 19 | . | |||||||||
| Peacock | 9 | 11 | . | . | 2 | . | . | . | . | 1 | 7 | 43 | 74 | 13 | 1 | 2 | . | |||||||||
| Comma | . | . | . | . | . | . | . | 2 | . | . | . | 2 | 4 | 2 | . | 15 | 6 | |||||||||
| Pearl-bordered Fritillary | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | 1 | 4 | 1 | . | . | 2 | 2 | 2 | 1 | . | 2 | . | 3 | 6 | 4 | 4 | 1 | |||||||||
| Marbled White | . | . | . | . | . | . | . | 6 | 11 | 17 | 32 | 3 | 3 | . | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 39 | 73 | 152 | 71 | 3 | . | . | |||||||||
| Meadow Brown | . | . | . | . | 1 | 9 | 22 | 77 | 70 | 55 | 83 | 37 | 47 | 26 | . | . | . | |||||||||
| Small Heath | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | 10 | . | 1 | . | |||||||||
| Ringlet | . | . | . | . | . | . | 1 | 9 | 20 | 74 | 180 | 38 | 50 | 3 | . | . | . | |||||||||