
| 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 | . | . | . | . | . | . | . | . | . | . | . | 4 | 4 | 12 | 2 | 1 | . | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | . | 1 | 5 | 6 | 4 | 3 | 1 | . | . | . | . | . | ||||||||
| Brimstone | 16 | 3 | 4 | 2 | . | . | . | . | . | . | . | . | . | 15 | 7 | 8 | 3 | 9 | ||||||||
| Large White | . | . | . | 3 | 9 | 10 | 10 | . | . | 3 | 1 | 3 | 10 | 9 | 8 | 5 | . | . | ||||||||
| Small White | . | . | . | 1 | 1 | 10 | 3 | 4 | . | 2 | 5 | 16 | 101 | 102 | 170 | 77 | 4 | 4 | ||||||||
| Green-veined White | . | 2 | 21 | 18 | 30 | 35 | 14 | 5 | 1 | 50 | 61 | 86 | 167 | 118 | 103 | 61 | 1 | . | ||||||||
| Orange Tip | . | . | 1 | 6 | 12 | 10 | 3 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||||||
| Small Tortoiseshell | . | . | 1 | . | 1 | 1 | . | . | . | . | 1 | 2 | 4 | . | . | 1 | 10 | 7 | ||||||||
| Peacock | 3 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | 12 | 32 | 42 | 57 | . | 1 | ||||||||
| Comma | 4 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 5 | 38 | 54 | 85 | 61 | 42 | 39 | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 17 | 37 | 87 | 100 | 52 | 66 | 50 | 16 | 7 | . | . | ||||||||
| Small Heath | . | . | . | . | 2 | 6 | 11 | 2 | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| Ringlet | . | . | . | . | . | . | . | 3 | 26 | 44 | 46 | 17 | . | . | . | . | . | . | ||||||||