
| 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 | 47 | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 7 | 16 | 4 | 5 | 3 | . | 1 | . | . | . | ||||
| Small Skipper | 46 | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 7 | 16 | 4 | 5 | 3 | . | 1 | . | . | . | ||||
| Essex Skipper | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Large Skipper | 39 | . | . | . | . | . | 1 | . | 2 | 9 | 10 | 8 | 4 | 3 | 2 | . | . | . | . | . | . | . | . | ||||
| Brimstone | 26 | . | 6 | 1 | 4 | 3 | . | 2 | . | . | 1 | . | 1 | . | . | . | 1 | 1 | . | . | . | . | . | ||||
| Large White | 27 | . | 1 | 1 | 4 | 3 | 1 | . | . | . | . | 2 | . | 3 | 4 | 1 | 1 | . | . | . | . | . | . | ||||
| Small White | 5 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | ||||
| Green-veined White | 71 | . | 1 | 2 | 6 | 5 | 3 | 1 | 1 | . | . | 1 | 1 | 2 | 13 | 9 | 5 | 4 | 2 | 1 | . | . | . | ||||
| Orange Tip | 18 | . | 5 | 2 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||
| Small Copper | 5 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||
| Small Blue | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brown Argus | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||
| Common Blue | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | ||||
| Holly Blue | 10 | . | . | . | 1 | 2 | 1 | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| White Admiral | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | 6 | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | ||||
| Painted Lady | 4 | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Tortoiseshell | 28 | 4 | . | . | . | 1 | . | . | 1 | 4 | . | 1 | . | 5 | . | 2 | 2 | . | 1 | 1 | 2 | . | . | ||||
| Peacock | 37 | 7 | 4 | 3 | 3 | . | 1 | . | . | . | . | . | . | . | 2 | 1 | 4 | 1 | . | . | . | . | . | ||||
| Comma | 22 | 1 | 1 | . | 1 | . | . | . | . | . | 1 | 4 | 1 | 1 | 1 | . | . | . | . | 1 | 5 | 3 | 2 | ||||
| Pearl-bordered Fritillary | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | 16 | . | . | . | . | . | . | . | . | . | 2 | 2 | 2 | . | 3 | 1 | 2 | 2 | . | . | . | . | . | ||||
| Speckled Wood | 175 | 2 | 2 | 9 | 6 | 3 | 6 | 12 | 1 | . | . | 1 | . | . | 7 | 7 | 22 | 34 | 18 | 9 | 9 | 5 | 4 | ||||
| Marbled White | 5 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | . | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 85 | . | . | . | . | . | . | . | . | . | . | . | . | 9 | 17 | 24 | 11 | 6 | . | . | . | . | . | ||||
| Meadow Brown | 265 | . | . | . | . | . | . | . | 2 | 4 | 16 | 38 | 33 | 70 | 50 | 25 | 6 | 3 | 2 | . | . | . | . | ||||
| Ringlet | 112 | . | . | . | . | . | . | . | . | 2 | 18 | 32 | 26 | 26 | 7 | 1 | . | . | . | . | . | . | . | ||||