
| 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 | . | . | . | . | 5 | 5 | 3 | 16 | 15 | 8 | 2 | . | . | . | . | . | . | |||||||||
| Large Skipper | . | . | . | . | 2 | 5 | 10 | 21 | 19 | 10 | 10 | 7 | . | . | 1 | . | . | |||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||||||||
| Brimstone | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||||
| Large White | . | . | . | . | . | . | . | . | 3 | 4 | 2 | 1 | . | 3 | 7 | 3 | 1 | |||||||||
| Small White | . | . | . | . | . | . | . | 1 | . | . | 2 | . | 9 | . | . | . | . | |||||||||
| Green-veined White | 3 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | 5 | 2 | 10 | 5 | . | . | . | . | . | 3 | 4 | 7 | 11 | 12 | 4 | 2 | |||||||||
| Common Blue | . | . | . | 30 | 16 | 12 | 6 | 5 | 4 | 5 | 2 | 4 | 5 | 19 | 16 | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | 16 | 18 | 2 | 1 | |||||||||
| Painted Lady | . | 3 | 1 | 14 | 7 | . | . | . | . | . | 10 | 4 | 12 | 7 | 11 | . | . | |||||||||
| Small Tortoiseshell | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Peacock | 7 | 4 | 3 | . | . | . | . | . | . | . | 12 | 8 | 16 | 20 | 20 | 6 | 3 | |||||||||
| Wall Brown | . | . | . | 10 | . | . | . | . | . | . | . | . | . | 2 | 5 | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 14 | 27 | 18 | 6 | 5 | 3 | . | . | |||||||||
| Meadow Brown | . | . | . | . | 4 | 6 | 8 | 16 | 16 | 17 | 33 | 20 | . | 1 | 2 | . | . | |||||||||
| Large Heath | . | . | . | 13 | 16 | 23 | 29 | 30 | 27 | 21 | 4 | . | . | . | . | . | . | |||||||||
| Ringlet | . | . | . | . | . | . | . | 8 | 8 | 7 | . | . | . | . | . | . | . | |||||||||