
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 20 | 26 | 34 | 19 | 15 | 1 | 1 | . | . | . | |||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | |||
| Large Skipper | 30 | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 7 | 8 | 2 | 1 | . | . | . | . | . | . | . | |||
| Dingy Skipper | 12 | . | . | . | . | . | . | . | 3 | 5 | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 34 | . | . | . | . | 4 | 3 | 8 | 6 | 5 | 4 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 40 | 9 | 12 | 1 | 1 | 4 | 1 | 2 | . | . | . | . | . | . | . | . | . | 2 | 3 | . | 1 | 1 | . | 1 | |||
| Large White | 12 | . | . | . | . | 1 | 2 | 1 | . | 2 | 1 | 1 | . | 1 | . | . | 1 | . | . | . | . | . | 2 | . | |||
| Small White | 40 | . | . | 1 | . | 3 | 2 | 1 | 1 | 4 | 1 | . | . | 1 | 3 | 3 | 2 | 1 | 4 | 2 | 1 | 5 | . | . | |||
| Green-veined White | 55 | . | . | . | . | . | 2 | 1 | 2 | 1 | 1 | . | . | . | . | . | 5 | 8 | 9 | 10 | 6 | 1 | 1 | . | |||
| Orange Tip | 9 | . | . | 1 | . | 1 | 3 | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | . | . | . | . | . | |||
| Small Copper | 10 | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | 1 | 1 | 1 | 2 | 1 | . | . | |||
| Brown Argus | 3 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | |||
| Common Blue | 21 | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | 1 | . | . | . | . | 3 | 2 | 5 | 1 | 1 | |||
| Duke of Burgundy Fritillary | 19 | . | . | . | . | . | . | 4 | 6 | 7 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| White Admiral | 21 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 6 | 3 | 1 | 1 | . | . | . | . | . | |||
| Red Admiral | 6 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | 2 | |||
| Painted Lady | 7 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||
| Small Tortoiseshell | 34 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | 3 | 4 | 1 | 7 | 1 | . | 1 | . | 3 | 3 | |||
| Peacock | 158 | 9 | 17 | 3 | 9 | 7 | . | 1 | . | . | . | 1 | . | . | . | . | 13 | 39 | 47 | 4 | 1 | . | 1 | 1 | |||
| Comma | 27 | 4 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 5 | 3 | 2 | 1 | . | . | 1 | 1 | |||
| Small Pearl-bordered Fritillary | 30 | . | . | . | . | . | . | . | . | 3 | 6 | 5 | 6 | 5 | 3 | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | 22 | . | . | . | . | . | 2 | 4 | 6 | 6 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Dark Green Fritillary | 33 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 9 | 8 | 2 | 2 | . | . | . | . | . | . | |||
| Silver-washed Fritillary | 67 | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 15 | 10 | 10 | 6 | 4 | 1 | 1 | . | . | |||
| Speckled Wood | 59 | . | . | 1 | 1 | 2 | . | 1 | 1 | 2 | 2 | 3 | 3 | 2 | 2 | 1 | . | . | 2 | 1 | 7 | 7 | 13 | 2 | |||
| Marbled White | 116 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 32 | 28 | 19 | 3 | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 349 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 8 | 61 | 70 | 77 | 47 | 32 | 10 | . | . | |||
| Meadow Brown | 96 | . | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 21 | 22 | 12 | 6 | 2 | 1 | . | . | . | 1 | |||
| Small Heath | 3 | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Ringlet | 236 | . | . | . | . | . | . | . | . | . | . | . | . | 15 | 67 | 58 | 25 | 6 | 2 | . | . | . | . | . | |||