
| 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/Essex Skipper | . | . | . | . | . | . | 5 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Skipper | . | . | . | . | . | . | 11 | 31 | 116 | 109 | 65 | 35 | 7 | 1 | . | . | . | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 3 | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | 14 | 3 | 3 | 4 | 1 | 2 | 1 | . | . | . | . | . | ||||||||
| Brimstone | 4 | 5 | 6 | 2 | 7 | 4 | . | . | 1 | . | . | 3 | 3 | 3 | 1 | 3 | . | . | ||||||||
| Large White | . | . | . | 3 | 3 | . | . | . | 11 | 25 | 19 | 18 | 1 | . | . | 1 | . | . | ||||||||
| Small White | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | 3 | . | . | ||||||||
| Green-veined White | . | . | 3 | 6 | 2 | 2 | 1 | 1 | 1 | 7 | 17 | 21 | 10 | . | 2 | 1 | . | . | ||||||||
| Orange Tip | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | ||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | ||||||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 9 | 2 | . | . | . | ||||||||
| Red Admiral | . | . | . | 1 | . | . | 3 | . | . | . | 2 | 2 | 2 | 1 | 2 | . | . | 1 | ||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | 3 | . | . | ||||||||
| Peacock | 5 | 8 | . | . | . | . | . | . | 2 | 3 | 3 | 6 | 1 | 1 | . | 1 | . | . | ||||||||
| Comma | 6 | 4 | . | . | . | . | . | 2 | 10 | 3 | . | . | . | . | . | 2 | 3 | 6 | ||||||||
| Pearl-bordered Fritillary | . | . | . | 5 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Heath Fritillary | . | . | . | . | . | 1 | 1 | 4 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 6 | 1 | 3 | 3 | 4 | ||||||||
| Wall Brown | . | . | . | . | 4 | 1 | . | . | . | . | 5 | 18 | 53 | 61 | 8 | 6 | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 31 | 146 | 458 | 505 | 297 | 206 | 108 | 20 | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | 6 | 4 | 78 | 84 | 57 | 37 | 13 | . | . | . | . | . | ||||||||
| Small Heath | . | . | . | . | 3 | 5 | . | . | . | . | . | 2 | 5 | 3 | 1 | 3 | 1 | 1 | ||||||||
| Ringlet | . | . | . | . | . | . | 7 | 9 | 55 | 40 | 31 | 7 | 1 | . | . | . | . | . | ||||||||
| Unknown White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | ||||||||