
| 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 | . | . | . | . | . | . | . | . | . | . | 37 | 80 | 135 | 102 | 112 | 32 | 7 | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | 2 | 4 | 19 | 24 | 11 | 4 | 7 | 4 | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | . | 1 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | . | 4 | 2 | 1 | 1 | . | . | . | . | . | . | . | 1 | 1 | 20 | 18 | 7 | 1 | . | 1 | . | |||||
| Large White | . | 4 | . | 2 | 5 | 2 | 1 | . | . | . | . | 5 | 3 | 10 | 24 | 13 | 9 | 1 | 3 | . | 2 | |||||
| Small White | . | . | . | . | . | 1 | . | . | . | . | 1 | . | 2 | 8 | 18 | 5 | . | 1 | 3 | . | . | |||||
| Green-veined White | . | . | 1 | 8 | 2 | 3 | . | . | . | . | 1 | 1 | 6 | 1 | 6 | 4 | 2 | 1 | 1 | . | . | |||||
| Orange Tip | . | 7 | 3 | 5 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | 2 | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | 2 | 1 | . | . | |||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Common Blue | . | . | . | . | 1 | 8 | 12 | 4 | 11 | 4 | . | . | . | 1 | 1 | 16 | 20 | 15 | 10 | 3 | . | |||||
| Holly Blue | . | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 10 | 1 | 4 | 2 | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | 1 | . | . | . | 12 | 11 | 6 | 7 | |||||
| Peacock | 9 | 3 | . | 3 | . | . | . | . | . | . | . | . | . | 2 | 44 | 20 | . | 3 | . | . | . | |||||
| Comma | 3 | 1 | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | 1 | . | 4 | 3 | 10 | 3 | |||||
| Pearl-bordered Fritillary | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | . | . | 2 | 1 | 1 | 1 | 1 | 2 | 4 | . | 1 | . | . | 1 | 3 | . | 2 | 8 | 8 | 10 | 3 | |||||
| Wall Brown | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | 23 | 73 | 64 | 16 | 13 | 4 | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 1 | 10 | 105 | 106 | 174 | 77 | 12 | 1 | 1 | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | . | 12 | 67 | 165 | 281 | 197 | 240 | 148 | 50 | 7 | . | . | . | . | |||||
| Small Heath | . | . | . | . | . | 2 | 2 | 1 | 5 | 3 | . | 2 | . | . | . | 1 | . | . | . | . | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | 1 | 63 | 242 | 236 | 116 | 71 | 36 | 3 | . | . | . | . | . | |||||