
| 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 | NI | . | . | . | . | . | . | . | . | . | 2 | 6 | . | . | . | . | . | . | . | ||||||||
| Silver-spotted Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | 4 | 6 | 7 | . | . | . | . | ||||||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | 9 | . | 1 | . | . | . | . | . | . | . | ||||||||
| Dingy Skipper | NI | . | . | 3 | . | 1 | 1 | 1 | 3 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | NI | . | 4 | 2 | 7 | 3 | 4 | 2 | 3 | . | . | . | 3 | 4 | . | 1 | . | 1 | 2 | ||||||||
| Large White | NI | . | . | 1 | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | . | ||||||||
| Small White | NI | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green-veined White | NI | . | . | 2 | 2 | . | 2 | 2 | 2 | . | . | 2 | 2 | 4 | . | 1 | 2 | 2 | . | ||||||||
| Orange Tip | NI | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | NI | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 2 | . | . | . | . | ||||||||
| Common Blue | NI | . | . | . | 1 | 5 | 8 | 4 | . | . | . | . | 7 | 5 | 6 | 1 | 2 | . | . | ||||||||
| Chalk-hill Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 4 | 2 | . | . | . | ||||||||
| Red Admiral | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | ||||||||
| Peacock | NI | . | . | 1 | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | 1 | ||||||||
| Comma | NI | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 3 | ||||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | 2 | 5 | 15 | . | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | 9 | 22 | 18 | 10 | . | . | . | . | ||||||||
| Meadow Brown | NI | . | . | . | . | . | . | . | 2 | 27 | 22 | 28 | 25 | 44 | 44 | 22 | 16 | 10 | 8 | ||||||||
| Small Heath | NI | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 3 | 2 | 6 | 11 | ||||||||
| Ringlet | NI | . | . | . | . | . | . | . | . | 29 | 28 | 3 | . | . | . | . | . | . | . | ||||||||