
| 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 | 130 | . | . | . | . | . | . | . | . | . | 24 | 29 | 42 | 4 | 2 | . | . | . | . | . | |||||||
| Small Skipper | 130 | . | . | . | . | . | . | . | . | . | 23 | 28 | 42 | 4 | 2 | . | . | . | . | . | |||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | |||||||
| Large Skipper | 8 | . | . | . | . | . | . | 2 | . | 2 | 1 | 1 | 1 | . | . | . | . | . | . | . | |||||||
| Brimstone | 25 | 1 | 2 | 2 | 3 | 2 | 3 | . | 1 | . | . | . | 2 | 2 | . | 1 | . | . | . | . | |||||||
| Large White | 54 | . | . | 1 | 8 | 4 | 5 | 4 | . | 1 | 9 | 2 | 5 | 2 | . | 2 | . | 3 | 1 | 1 | |||||||
| Small White | 22 | . | . | . | . | . | 1 | 2 | 2 | 1 | . | . | 5 | 1 | . | 1 | . | 1 | 3 | . | |||||||
| Green-veined White | 55 | . | . | 1 | . | . | 3 | 2 | 1 | . | 2 | 11 | 16 | 2 | 3 | 1 | . | . | . | . | |||||||
| Orange Tip | 24 | 1 | 1 | 7 | 3 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | 11 | . | . | . | . | . | . | . | . | . | . | . | 5 | 2 | . | . | . | . | . | . | |||||||
| Small Copper | 17 | . | . | . | . | 1 | 1 | 1 | . | 1 | . | . | 1 | 2 | 2 | 4 | . | 2 | 1 | . | |||||||
| Brown Argus | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | . | |||||||
| Common Blue | 41 | . | . | . | . | . | 1 | 7 | 2 | 5 | . | . | . | 3 | 2 | 6 | 9 | 4 | . | . | |||||||
| Holly Blue | 36 | 2 | . | 3 | 4 | 2 | 7 | 1 | . | . | . | 1 | 5 | . | 1 | 2 | 2 | . | . | . | |||||||
| Duke of Burgundy Fritillary | 9 | . | . | . | . | 3 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| White Admiral | 4 | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | |||||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||
| Small Tortoiseshell | 13 | . | . | . | . | . | 1 | . | . | 1 | 1 | . | . | . | . | 1 | 5 | 1 | 2 | . | |||||||
| Peacock | 135 | 14 | 13 | 9 | 2 | 5 | 2 | . | . | . | . | . | 33 | 4 | 2 | . | . | . | . | . | |||||||
| Comma | 30 | 5 | . | 3 | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | 5 | 5 | |||||||
| Small Pearl-bordered Fritillary | 2 | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | 162 | . | . | . | . | . | . | . | . | . | 30 | 24 | 42 | 19 | 12 | 4 | . | . | . | . | |||||||
| Speckled Wood | 329 | . | 12 | 13 | 14 | 5 | 12 | 18 | 11 | 9 | 2 | . | 18 | 28 | 19 | 41 | 35 | 22 | 2 | . | |||||||
| Marbled White | 206 | . | . | . | . | . | . | . | . | . | 62 | 53 | 13 | 2 | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 419 | . | . | . | . | . | . | . | . | . | 9 | 20 | 157 | 56 | 41 | 29 | . | . | . | . | |||||||
| Meadow Brown | 1144 | . | . | . | . | . | . | 1 | 12 | 219 | 335 | 235 | 106 | 18 | 13 | . | 1 | . | . | . | |||||||
| Small Heath | 5 | . | . | . | . | 1 | 2 | 2 | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||||
| Ringlet | 336 | . | . | . | . | . | . | . | 4 | 7 | 143 | 90 | 33 | . | . | . | . | . | . | . | |||||||