
| 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 | . | 15 | . | . | . | . | . | . | . | ||||||
| Essex Skipper | . | . | . | . | . | . | . | . | 8 | 47 | 23 | 26 | 28 | 4 | 1 | 5 | 1 | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | 9 | . | 2 | 1 | 1 | . | . | . | . | . | ||||||
| Brimstone | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 8 | . | ||||||
| Large White | . | . | . | . | 1 | . | . | . | 1 | 2 | 7 | . | 1 | 1 | . | . | . | . | . | 2 | ||||||
| Small White | . | . | . | . | . | . | . | . | . | 6 | 8 | . | 20 | 8 | 8 | 20 | 38 | 62 | . | 30 | ||||||
| Green-veined White | 2 | 9 | 10 | . | 5 | . | 2 | 2 | 2 | 13 | 9 | 12 | 5 | 4 | 4 | 7 | 24 | 21 | . | 19 | ||||||
| Orange Tip | . | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Common Blue | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | 1 | 4 | . | . | . | . | ||||||
| Holly Blue | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | 1 | 1 | . | . | . | . | 1 | 1 | . | . | . | . | . | . | 1 | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | ||||||
| Peacock | 7 | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | 2 | . | . | . | ||||||
| Comma | 2 | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | 1 | 1 | 1 | . | . | 4 | ||||||
| Marbled White | . | . | . | . | . | . | . | . | 1 | 4 | . | . | . | . | . | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 1 | . | 41 | 77 | 113 | 27 | 22 | 10 | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | 1 | . | 3 | 9 | 5 | . | . | . | . | . | . | . | . | . | ||||||
| Small Heath | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 3 | 2 | 1 | ||||||