
| 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/Essex Skipper | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | ||||||||||
| Small Skipper | . | . | . | . | . | 1 | 4 | 3 | . | . | . | . | . | . | . | . | ||||||||||
| Essex Skipper | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||||||
| Large Skipper | . | . | . | . | 1 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | ||||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||||
| Large White | . | . | 2 | . | . | . | 3 | 1 | 1 | 1 | 2 | 1 | . | . | . | . | ||||||||||
| Small White | 3 | 2 | . | 4 | . | . | . | 3 | 1 | 1 | 1 | 2 | 4 | 3 | . | . | ||||||||||
| Green-veined White | . | . | 1 | . | . | . | . | 2 | 9 | 4 | 5 | . | 1 | 1 | . | . | ||||||||||
| Orange Tip | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||||
| Purple Hairstreak | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | . | ||||||||||
| White-letter Hairstreak | . | . | . | . | . | 18 | 11 | 2 | . | . | . | . | . | . | . | . | ||||||||||
| Small Copper | . | . | 13 | 5 | . | . | . | . | 3 | 1 | 1 | . | . | 1 | 2 | 2 | ||||||||||
| Common Blue | . | . | . | . | . | . | . | . | . | 3 | 3 | . | 1 | . | . | . | ||||||||||
| Holly Blue | 1 | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||||||
| Red Admiral | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | 3 | 2 | ||||||||||
| Painted Lady | . | . | . | 1 | . | . | . | . | . | 5 | 2 | . | . | . | . | . | ||||||||||
| Peacock | 5 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||||
| Comma | 1 | 2 | . | . | . | 1 | 3 | 1 | . | . | . | . | . | . | . | . | ||||||||||
| Speckled Wood | . | . | . | . | . | 2 | . | . | . | . | 2 | 1 | . | . | 1 | 1 | ||||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | 1 | . | . | 172 | 173 | 31 | 6 | . | . | . | . | . | ||||||||||
| Meadow Brown | . | . | . | . | 1 | 67 | 218 | 340 | 278 | 130 | 55 | 5 | 2 | . | . | . | ||||||||||
| Six-spot Burnet | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||||||
| Vaporour | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | ||||||||||
| Narrow-bordered 5-spot Burnet | . | . | . | . | . | 3 | 2 | . | . | . | . | . | . | . | . | . | ||||||||||
| Burnet Companion | . | . | . | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||||
| Small Yellow Underwing | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||||