
| 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 | 36 | . | . | . | . | . | . | 1 | 1 | . | 16 | 5 | 5 | . | . | . | . | . | . | . | |||||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | 8 | 2 | 3 | 4 | . | . | . | . | . | . | . | |||||||
| Brimstone | NI | 2 | 2 | . | . | . | . | . | . | . | 1 | . | 5 | . | . | . | . | . | . | . | |||||||
| Large White | 52 | . | 1 | . | 1 | 2 | 1 | 1 | . | 7 | 9 | 4 | 6 | 2 | 3 | 1 | . | 2 | 1 | . | |||||||
| Small White | 72 | 1 | . | . | . | 1 | 2 | 2 | . | 2 | 15 | 1 | 16 | 4 | 5 | 7 | . | 2 | 2 | . | |||||||
| Green-veined White | 97 | . | . | . | 7 | 6 | 2 | 1 | . | . | 12 | 22 | 1 | 23 | 3 | . | 2 | . | . | . | |||||||
| Orange Tip | NI | 1 | 1 | 3 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | . | |||||||
| Small Copper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||||
| Brown Argus | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||
| Common Blue | 4 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 3 | . | . | . | . | . | |||||||
| Holly Blue | NI | . | . | . | . | . | . | . | . | . | 3 | 2 | 3 | 1 | . | . | . | . | . | . | |||||||
| White Admiral | 6 | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | . | . | . | . | . | . | . | |||||||
| Red Admiral | NI | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | |||||||
| Peacock | 60 | 12 | 19 | 5 | 2 | . | 1 | . | . | . | 4 | 12 | 2 | . | . | . | . | . | . | . | |||||||
| Comma | 29 | 3 | 4 | 1 | . | 2 | 1 | 4 | 1 | 2 | 3 | . | . | . | . | . | . | . | . | 1 | |||||||
| Silver-washed Fritillary | 333 | . | . | . | . | . | . | . | . | 39 | 70 | 64 | 41 | 25 | 2 | . | . | . | . | . | |||||||
| Speckled Wood | 150 | . | . | . | 1 | . | 1 | 12 | 14 | . | 5 | 13 | 6 | 3 | 19 | 29 | 7 | 7 | 4 | 11 | |||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 123 | . | . | . | . | . | . | . | . | . | 44 | 37 | 25 | 3 | . | . | . | . | . | . | |||||||
| Meadow Brown | 368 | . | . | . | . | . | . | . | . | 30 | 109 | 86 | 40 | 9 | 7 | 2 | . | 1 | . | . | |||||||
| Ringlet | 468 | . | . | . | . | . | . | . | . | 100 | 93 | 53 | 23 | 1 | . | . | . | . | . | . | |||||||