
| 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 | 16 | . | . | . | . | . | . | . | . | . | 1 | 2 | 4 | 5 | 2 | . | . | . | |||||||||
| Large Skipper | 32 | . | . | . | . | . | . | 1 | 13 | 4 | 4 | . | . | . | . | . | . | . | |||||||||
| Brimstone | 20 | . | . | 2 | 1 | . | . | . | . | . | . | . | 3 | 2 | 5 | . | 1 | . | |||||||||
| Large White | 38 | . | . | . | 3 | . | 1 | . | 1 | 1 | 1 | 3 | 6 | 4 | 4 | 2 | 1 | . | |||||||||
| Small White | 36 | . | . | . | 1 | . | . | . | 1 | 2 | 2 | 4 | 6 | 6 | 3 | 1 | . | 1 | |||||||||
| Green-veined White | 133 | . | . | . | 9 | 6 | 6 | 2 | 1 | 1 | 2 | 8 | 20 | 14 | 9 | 5 | 6 | 3 | |||||||||
| Orange Tip | 13 | . | . | . | 4 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Purple Hairstreak | 5 | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | 1 | . | . | . | |||||||||
| Small Copper | NI | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 1 | 2 | 5 | . | . | |||||||||
| Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 3 | . | . | |||||||||
| Common Blue | 51 | . | . | . | . | . | 3 | 3 | . | 1 | 1 | . | . | 3 | 4 | 11 | 4 | . | |||||||||
| Holly Blue | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| White Admiral | 9 | . | . | . | . | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | |||||||||
| Red Admiral | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | |||||||||
| Small Tortoiseshell | NI | . | . | 1 | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | |||||||||
| Peacock | 72 | . | 12 | 10 | 4 | 1 | . | 1 | . | . | . | . | 5 | 12 | 5 | . | . | . | |||||||||
| Comma | NI | . | 8 | . | . | . | . | . | . | 1 | 2 | 1 | 1 | 1 | . | . | 6 | 6 | |||||||||
| Dark Green Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||||
| Silver-washed Fritillary | 129 | . | . | . | . | . | . | . | . | 7 | 18 | 21 | 21 | 13 | 14 | 4 | . | . | |||||||||
| Speckled Wood | 66 | . | . | . | 1 | 1 | 1 | 3 | 2 | 2 | 1 | 1 | 2 | 4 | 2 | 9 | 7 | 2 | |||||||||
| Marbled White | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 165 | . | . | . | . | . | . | . | . | . | . | 15 | 22 | 49 | 40 | 7 | . | . | |||||||||
| Meadow Brown | 477 | . | . | . | . | . | . | . | 14 | 49 | 52 | 54 | 78 | 62 | 42 | 15 | . | . | |||||||||
| Ringlet | 118 | . | . | . | . | . | . | . | 3 | 31 | 38 | 7 | . | . | . | . | . | . | |||||||||