
| 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 | 7 | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 2 | . | 1 | 1 | . | . | . | . | . | |||||
| Large Skipper | 14 | . | . | . | . | . | . | 1 | 1 | 1 | 3 | 4 | 2 | 1 | 1 | 1 | . | . | . | . | . | . | |||||
| Clouded Yellow | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Brimstone | 31 | 2 | 3 | 5 | 4 | 1 | . | 1 | . | . | . | . | 1 | 1 | . | 2 | 1 | 1 | . | 1 | . | . | |||||
| Large White | 132 | . | . | . | 2 | 4 | 5 | 9 | 6 | 4 | 7 | 5 | 9 | 11 | 12 | 17 | 8 | 15 | 3 | 3 | 1 | . | |||||
| Small White | 55 | . | . | . | . | . | . | 2 | 3 | 2 | . | 3 | 4 | 3 | 8 | 8 | 3 | 7 | 2 | 3 | 2 | . | |||||
| Green-veined White | 75 | . | 1 | 1 | 3 | 5 | 3 | 2 | . | . | . | . | 1 | 4 | 7 | 7 | 5 | 10 | 6 | 1 | 3 | . | |||||
| Orange Tip | NI | . | . | . | . | 3 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 8 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 2 | 2 | . | 1 | . | . | . | . | |||||
| Small Copper | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | |||||
| Brown Argus | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | |||||
| Common Blue | 12 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 3 | 3 | . | . | . | . | |||||
| Holly Blue | 10 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | 3 | . | . | 1 | . | |||||
| White Admiral | 43 | . | . | . | . | . | . | . | . | 1 | 5 | 8 | 15 | 10 | 5 | . | . | . | . | . | . | . | |||||
| Red Admiral | 53 | . | . | 2 | . | . | 1 | . | 2 | 1 | 1 | 1 | 3 | 3 | 5 | 5 | 5 | 8 | 2 | 1 | 4 | 1 | |||||
| Painted Lady | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | . | 1 | . | . | |||||
| Small Tortoiseshell | NI | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Peacock | 15 | 1 | 1 | 5 | 1 | . | . | . | . | . | . | . | . | 1 | 1 | 4 | 1 | . | . | . | . | . | |||||
| Comma | 138 | 3 | 12 | 26 | 19 | . | 3 | 2 | 2 | 2 | 4 | 2 | 11 | 3 | 2 | 6 | 2 | 6 | 1 | . | 5 | . | |||||
| Silver-washed Fritillary | 17 | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 2 | 4 | 4 | 2 | 2 | . | . | . | . | |||||
| Speckled Wood | 314 | . | . | . | 7 | 7 | 7 | 11 | 14 | 13 | 13 | 8 | 5 | 8 | 8 | 6 | 9 | 24 | 17 | 24 | 23 | 16 | |||||
| Wall Brown | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Marbled White | 34 | . | . | . | . | . | . | . | . | . | 4 | 5 | 3 | 11 | 9 | 2 | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 137 | . | . | . | . | . | . | . | . | . | . | 1 | 9 | 13 | 42 | 48 | 13 | 9 | 2 | . | . | . | |||||
| Meadow Brown | 2073 | . | . | . | . | . | . | 4 | 6 | 93 | 165 | 186 | 227 | 193 | 157 | 415 | 150 | 307 | 97 | 73 | 35 | 1 | |||||
| Small Heath | 2 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||
| Ringlet | 19 | . | . | . | . | . | . | . | . | . | . | 2 | 9 | 6 | 2 | . | . | . | . | . | . | . | |||||