
| 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 | 7 | . | 1 | . | . | . | . | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | 1 | 6 | 5 | 16 | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 13 | 25 | 3 | 10 | . | 4 | 2 | . | . | . | 1 | 2 | 5 | 6 | 2 | 3 | 3 | . | . | . | . | |||||
| Large White | . | . | . | 4 | 7 | 7 | 7 | 6 | 1 | . | . | 3 | 10 | 6 | 3 | . | . | . | . | . | . | |||||
| Small White | . | . | . | . | . | 4 | 2 | 3 | . | . | 5 | 3 | 7 | 30 | 47 | 6 | 17 | 7 | 12 | . | 2 | |||||
| Green-veined White | . | . | 6 | 20 | 37 | 34 | 19 | 5 | 4 | 4 | 15 | 40 | 57 | 47 | 16 | 13 | 1 | 1 | . | . | . | |||||
| Orange Tip | . | . | . | 10 | 16 | 15 | 11 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | 3 | 1 | 1 | . | . | . | 1 | |||||
| Common Blue | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | 1 | 3 | 4 | 3 | . | . | . | . | |||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | 2 | . | 1 | . | . | . | 1 | |||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 3 | . | . | . | . | . | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | 3 | 2 | 3 | . | . | 1 | 1 | . | 2 | . | . | . | |||||
| Peacock | 16 | 8 | 21 | . | 6 | 3 | . | . | . | . | . | 3 | 16 | 5 | 1 | 1 | . | . | . | . | . | |||||
| Speckled Wood | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Wall Brown | . | . | . | . | . | 36 | 19 | 2 | . | . | . | . | 2 | 25 | 38 | 13 | 9 | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 30 | 212 | 186 | 123 | 59 | 29 | 3 | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 1 | 12 | 106 | 173 | 80 | 105 | 135 | 47 | 12 | 1 | . | . | . | . | |||||
| Small Heath | . | . | . | . | . | 2 | 3 | 5 | 2 | 17 | 5 | 1 | 1 | . | 1 | 4 | 5 | 2 | 2 | . | . | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | 6 | 72 | 31 | 7 | 1 | . | . | . | . | . | . | . | |||||
| No butterflies seen | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||