
| 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 | . | . | 1 | 4 | . | . | . | . | . | . | ||||||
| Large Skipper | 13 | . | . | . | . | . | . | . | . | 2 | 2 | 4 | 4 | 1 | . | . | . | . | . | . | . | ||||||
| Brimstone | 11 | 8 | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Large White | 24 | . | . | 1 | 1 | 4 | . | . | . | 1 | . | . | 3 | 2 | 1 | 2 | 2 | 1 | . | . | . | ||||||
| Small White | 14 | . | . | 1 | 1 | 1 | . | . | . | . | . | 1 | . | . | . | 2 | . | 1 | 2 | 2 | . | ||||||
| Green-veined White | 39 | 1 | . | . | 3 | 2 | 1 | 2 | . | . | 1 | 2 | 4 | 3 | 2 | 5 | 1 | 3 | 1 | 1 | . | ||||||
| Orange Tip | 19 | . | . | 1 | 3 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Small Copper | 6 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 1 | . | 2 | . | . | . | ||||||
| Common Blue | 21 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | 12 | 1 | . | . | . | . | ||||||
| Holly Blue | 11 | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 3 | 2 | 2 | . | 2 | . | . | . | ||||||
| Red Admiral | 3 | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | ||||||
| Small Tortoiseshell | 19 | 6 | 1 | . | . | . | . | 1 | 4 | 2 | 4 | . | . | . | . | . | . | . | . | . | . | ||||||
| Peacock | 37 | 11 | 3 | 5 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Comma | 7 | 2 | . | . | . | . | . | . | 1 | . | . | 1 | 2 | 1 | . | . | . | . | . | . | . | ||||||
| Speckled Wood | 116 | 2 | . | 2 | 1 | 13 | 1 | 2 | . | 1 | 1 | . | 5 | 9 | . | 4 | 10 | 12 | 18 | 9 | 4 | ||||||
| Gatekeeper / Hedge Brown | 28 | . | . | . | . | . | . | . | . | . | . | . | 4 | 7 | 12 | 4 | . | 1 | . | . | . | ||||||
| Meadow Brown | 205 | . | . | . | . | . | . | 1 | 1 | 27 | 27 | 29 | 27 | 27 | 26 | 11 | 18 | 11 | . | . | . | ||||||
| Ringlet | 19 | . | . | . | . | . | . | . | . | . | 8 | 1 | 8 | 2 | . | . | . | . | . | . | . | ||||||