
| 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 | 36 | 10 | 5 | 3 | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 1 | 8 | 24 | 12 | 2 | 6 | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Brimstone | 15 | 14 | 5 | 4 | . | 2 | 1 | 2 | . | . | . | . | . | 1 | 13 | 27 | 21 | . | . | 2 | ||||||
| Large White | . | . | . | . | 8 | 6 | 7 | 10 | . | 1 | 2 | . | 6 | 14 | 5 | 5 | 1 | . | . | . | ||||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 6 | 5 | 6 | 7 | 4 | 5 | ||||||
| Green-veined White | . | . | 2 | 5 | 8 | 17 | 11 | 16 | 1 | 3 | 1 | 6 | 37 | 28 | 42 | 37 | 14 | 8 | 2 | 3 | ||||||
| Orange Tip | . | . | . | . | . | 5 | 6 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| White-letter Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | ||||||
| Common Blue | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 1 | 1 | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 2 | 1 | 1 | . | . | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||
| Small Tortoiseshell | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||
| Peacock | 7 | 12 | 5 | 7 | . | . | 1 | 1 | . | . | . | . | . | 30 | 50 | 104 | 15 | . | . | . | ||||||
| Comma | 19 | 4 | 2 | 2 | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | ||||||
| Wall Brown | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 3 | 19 | 40 | 18 | 4 | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 1 | 33 | 69 | 71 | 74 | 50 | 1 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 1 | 3 | 43 | 99 | 100 | 93 | 128 | 48 | 5 | 1 | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 2 | 95 | 160 | 126 | 55 | 41 | 15 | . | . | . | . | ||||||