
| 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 | 162 | . | . | . | . | . | . | . | . | 6 | 15 | 32 | 38 | 44 | 18 | 5 | 2 | 2 | . | . | |||||||
| Small Skipper | 162 | . | . | . | . | . | . | . | . | 6 | 13 | 31 | 38 | 44 | 18 | 5 | 2 | 2 | . | . | |||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | |||||||
| Large Skipper | 44 | . | . | . | . | . | 1 | 6 | 9 | 8 | 8 | 5 | 5 | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | 3 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | 35 | 1 | 1 | 5 | 2 | 2 | 4 | 2 | 1 | . | . | . | 1 | 2 | 2 | . | . | . | . | 6 | |||||||
| Large White | 39 | . | . | . | 3 | 2 | 2 | 2 | . | . | 2 | 5 | 4 | 8 | 6 | 1 | . | . | . | . | |||||||
| Small White | 71 | . | . | . | 1 | 1 | . | . | . | . | . | 1 | 6 | 17 | 17 | 6 | 10 | 7 | 2 | 1 | |||||||
| Green-veined White | 72 | . | . | . | 5 | 1 | 1 | 1 | . | 2 | 1 | 8 | 7 | 9 | 12 | 6 | 4 | 2 | 2 | 4 | |||||||
| Orange Tip | 27 | . | 4 | 12 | 3 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| White-letter Hairstreak | 2 | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 22 | . | . | . | . | . | . | 1 | . | . | . | . | . | 4 | 9 | 3 | 1 | 2 | 1 | 1 | |||||||
| Brown Argus | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 3 | 1 | . | . | |||||||
| Common Blue | 24 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 2 | 8 | 5 | 3 | . | |||||||
| Duke of Burgundy Fritillary | 4 | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| White Admiral | 12 | . | . | . | . | . | . | . | . | . | 2 | 3 | 5 | 2 | . | . | . | . | . | . | |||||||
| Red Admiral | 4 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 2 | . | . | . | . | . | |||||||
| Painted Lady | 3 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | |||||||
| Small Tortoiseshell | 22 | . | . | 1 | . | . | . | . | . | . | 4 | 2 | 1 | . | 1 | 1 | 2 | 4 | 2 | 4 | |||||||
| Peacock | 90 | 11 | 6 | 11 | 5 | 2 | 2 | 1 | . | . | . | . | 8 | 14 | 10 | 4 | 3 | . | . | . | |||||||
| Comma | 8 | 3 | . | 1 | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | 110 | . | . | . | . | . | . | . | . | 2 | 10 | 20 | 26 | 14 | 22 | 6 | 7 | 3 | . | . | |||||||
| Speckled Wood | 309 | . | 2 | 6 | 2 | 4 | 9 | 15 | 18 | 5 | 6 | 4 | 17 | 9 | 32 | 30 | 32 | 34 | 29 | 7 | |||||||
| Marbled White | 132 | . | . | . | . | . | . | . | . | 23 | 34 | 29 | 34 | 12 | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 199 | . | . | . | . | . | . | . | . | . | 3 | 31 | 31 | 37 | 55 | 28 | 8 | 5 | 1 | . | |||||||
| Meadow Brown | 199 | . | . | . | . | . | . | . | 15 | 58 | 33 | 19 | 30 | 18 | 22 | 3 | 1 | . | . | . | |||||||
| Ringlet | 302 | . | . | . | . | . | . | 1 | 7 | 89 | 93 | 56 | 44 | 10 | 2 | . | . | . | . | . | |||||||