
| 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 | 23 | 42 | 101 | 80 | 36 | 16 | 2 | . | . | . | . | ||||||
| Large Skipper | NI | . | . | . | . | . | . | 2 | 2 | 3 | 11 | 5 | 7 | 6 | . | 1 | . | . | . | . | . | ||||||
| Grizzled Skipper | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Wood White | 33 | . | . | . | 3 | 1 | 5 | 2 | 1 | 1 | . | . | . | 4 | . | 6 | 2 | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | ||||||
| Brimstone | 26 | . | 3 | 5 | 2 | . | . | 1 | . | . | . | . | . | 3 | 6 | 2 | . | 1 | 1 | . | . | ||||||
| Large White | 6 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | 3 | . | . | ||||||
| Small White | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | 1 | . | ||||||
| Green-veined White | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | ||||||
| Green Hairstreak | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Common Blue | 25 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 2 | 12 | 7 | . | 1 | . | . | ||||||
| Holly Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||
| Purple Emperor | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Painted Lady | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | 1 | . | . | ||||||
| Small Tortoiseshell | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Peacock | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 1 | ||||||
| Comma | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | ||||||
| Pearl-bordered Fritillary | 6 | . | . | . | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Silver-washed Fritillary | 46 | . | . | . | . | . | . | . | . | . | 12 | 7 | 6 | 6 | 10 | 3 | 2 | . | . | . | . | ||||||
| Speckled Wood | 64 | . | 3 | 6 | 2 | 7 | 1 | 5 | 1 | . | . | . | . | . | 2 | 3 | 4 | 4 | 8 | 9 | 3 | ||||||
| Marbled White | 7 | . | . | . | . | . | . | . | . | . | . | 6 | . | . | . | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 421 | . | . | . | . | . | . | . | . | . | . | . | 27 | 85 | 72 | 193 | 35 | 9 | . | . | . | ||||||
| Meadow Brown | 558 | . | . | . | . | . | . | . | 3 | 17 | 46 | 40 | 75 | 130 | 64 | 116 | 49 | 13 | 5 | . | . | ||||||
| Small Heath | 27 | . | . | . | . | 1 | 5 | 4 | 1 | 1 | . | . | . | . | 1 | 1 | 5 | 2 | 2 | 1 | 1 | ||||||
| Ringlet | 159 | . | . | . | . | . | . | . | . | . | 35 | 60 | 58 | 3 | 1 | 2 | . | . | . | . | . | ||||||