
| 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 Skipper | NI | . | . | . | . | . | . | . | 7 | 46 | 49 | 23 | 13 | 5 | 1 | . | . | . | . | ||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | 31 | 37 | 48 | 20 | 24 | 9 | 1 | . | . | . | ||||||||
| Large Skipper | 26 | . | . | . | . | . | . | . | 2 | 5 | 7 | 4 | 2 | 1 | . | . | . | . | . | ||||||||
| Brimstone | 5 | 3 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | ||||||||
| Large White | NI | . | . | 1 | 1 | 3 | 2 | . | . | 1 | 9 | 8 | 2 | 1 | 2 | 1 | 8 | 1 | 2 | ||||||||
| Small White | NI | 1 | . | . | . | . | . | 2 | 4 | 2 | 7 | 4 | 1 | . | 2 | 3 | 5 | 2 | 1 | ||||||||
| Green-veined White | NI | . | 1 | 1 | . | 2 | . | . | . | 2 | 2 | 5 | 2 | 1 | 7 | 3 | 6 | 2 | 1 | ||||||||
| Orange Tip | NI | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | 4 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 2 | . | . | . | . | . | ||||||||
| Small Copper | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | 3 | 1 | . | . | 1 | . | ||||||||
| Common Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 8 | 3 | 1 | . | ||||||||
| Holly Blue | NI | . | . | . | 5 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | 7 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 1 | 3 | . | ||||||||
| Painted Lady | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | 1 | . | ||||||||
| Small Tortoiseshell | 24 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 2 | 4 | 6 | 4 | 4 | ||||||||
| Peacock | 72 | 8 | 2 | 1 | 1 | . | . | . | . | . | 1 | 34 | 9 | 5 | 3 | . | . | . | . | ||||||||
| Comma | 33 | 1 | 1 | 1 | . | . | . | 1 | 1 | 2 | . | 1 | 1 | . | . | 1 | 2 | 6 | 8 | ||||||||
| Pearl-bordered Fritillary | NI | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Heath Fritillary | NI | . | . | . | . | . | . | 41 | 44 | 40 | 19 | 2 | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | 80 | . | 2 | 1 | . | . | 1 | 3 | . | . | 2 | 2 | 1 | 1 | 10 | 13 | 17 | 11 | 8 | ||||||||
| Wall Brown | NI | . | . | . | 3 | 5 | 7 | . | . | . | . | 1 | 2 | 5 | 8 | 2 | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 1847 | . | . | . | . | . | . | . | . | 99 | 276 | 570 | 472 | 266 | 105 | 8 | 1 | . | . | ||||||||
| Meadow Brown | 759 | . | . | . | . | . | . | 9 | 95 | 107 | 141 | 110 | 81 | 45 | 10 | 3 | . | . | . | ||||||||
| Small Heath | NI | . | . | . | 1 | 1 | 1 | 6 | 1 | 4 | 1 | . | . | . | . | 4 | 1 | . | . | ||||||||
| Ringlet | 104 | . | . | . | . | . | . | . | 21 | 16 | 29 | 4 | 4 | . | . | . | . | . | . | ||||||||