
| 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 | Ind | ||||||||||||||||||||||||||
| Small/Essex Skipper | 28 | . | . | . | . | . | . | . | . | . | 2 | 10 | 5 | . | . | . | . | . | . | . | |||||||
| Small Skipper | NI | . | . | . | . | . | . | . | . | 2 | 2 | 10 | 5 | 2 | . | . | . | . | . | . | |||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | 2 | 2 | 1 | . | . | . | . | . | . | . | |||||||
| Large Skipper | 9 | . | . | . | . | . | . | . | 2 | 3 | 4 | . | . | . | . | . | . | . | . | . | |||||||
| Large White | 19 | . | . | 2 | 1 | 1 | 2 | . | . | . | 1 | . | 6 | 1 | 2 | 1 | . | . | . | . | |||||||
| Small White | 30 | . | . | 1 | 3 | 8 | 2 | 1 | . | . | 1 | . | 4 | 1 | 2 | . | . | . | . | . | |||||||
| Green-veined White | NI | . | . | . | 1 | 3 | 1 | . | . | . | . | . | 2 | 5 | 1 | 4 | . | . | . | . | |||||||
| Orange Tip | 6 | . | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Common Blue | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 1 | . | . | . | . | |||||||
| Holly Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||
| White Admiral | 4 | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | NI | 1 | . | . | . | . | . | . | 1 | . | . | . | 3 | 5 | . | . | . | . | . | 2 | |||||||
| Small Tortoiseshell | NI | 5 | . | 1 | . | . | . | . | . | 2 | 1 | 2 | 1 | 1 | . | . | . | . | . | . | |||||||
| Peacock | 27 | 3 | 3 | 9 | 2 | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||||
| Comma | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | |||||||
| Speckled Wood | 49 | . | . | 1 | 4 | 3 | 4 | 1 | . | . | . | . | 1 | 2 | 8 | 11 | . | . | 2 | . | |||||||
| Marbled White | 2 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 142 | . | . | . | . | . | . | . | . | . | . | 4 | 47 | 47 | 10 | . | . | . | . | . | |||||||
| Meadow Brown | 287 | . | . | . | . | . | . | 2 | 25 | 50 | 71 | 40 | 49 | 17 | 10 | 5 | . | . | . | . | |||||||
| Small Heath | NI | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||