
| 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 | NI | . | . | . | . | . | . | . | . | . | . | 3 | 7 | 9 | 14 | 4 | 6 | . | . | . | . | ||||||
| Large Skipper | 103 | . | . | . | . | . | . | . | . | 3 | 7 | 22 | 19 | 18 | 14 | 2 | 2 | . | . | . | . | ||||||
| Brimstone | NI | 8 | 3 | 8 | 11 | 6 | 5 | 4 | 2 | . | . | . | . | . | . | 2 | 9 | 2 | 5 | 7 | 8 | ||||||
| Large White | 26 | . | . | . | 1 | . | . | . | 2 | 2 | . | . | 2 | 1 | . | . | 2 | 1 | 3 | 3 | 2 | ||||||
| Small White | 20 | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | 1 | . | 3 | 1 | . | 3 | 3 | ||||||
| Green-veined White | NI | . | . | . | 3 | 2 | 2 | 1 | . | . | . | . | . | . | . | 3 | 2 | . | . | . | . | ||||||
| Orange Tip | 16 | . | . | . | . | 2 | 4 | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | . | ||||||
| Common Blue | 22 | . | . | . | . | . | . | . | 3 | 7 | . | . | . | . | . | 2 | 5 | . | . | . | . | ||||||
| Holly Blue | 26 | . | . | 2 | 1 | 1 | 2 | 3 | . | . | . | . | . | . | . | 2 | 4 | 2 | 1 | . | . | ||||||
| White Admiral | NI | . | . | . | . | . | . | . | . | . | 1 | . | 3 | 3 | 2 | . | . | . | . | . | . | ||||||
| Red Admiral | NI | 2 | 1 | 1 | . | . | . | . | . | . | . | 1 | 2 | . | . | . | 1 | . | 4 | 4 | 3 | ||||||
| Small Tortoiseshell | NI | . | 1 | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | ||||||
| Peacock | 7 | 2 | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Comma | 21 | 2 | . | . | . | 1 | . | . | . | . | . | 1 | 1 | . | . | . | 2 | . | 3 | 2 | 3 | ||||||
| Pearl-bordered Fritillary | 2 | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Silver-washed Fritillary | NI | . | . | . | . | . | . | . | . | . | 2 | 8 | 8 | 7 | 6 | 9 | 12 | . | . | . | . | ||||||
| Speckled Wood | 168 | . | 5 | 10 | 9 | 6 | 5 | 2 | 4 | 4 | 2 | 2 | 5 | 2 | 1 | 5 | 11 | 18 | 10 | 11 | 14 | ||||||
| Marbled White | 23 | . | . | . | . | . | . | . | . | . | . | 1 | 8 | 11 | 4 | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | 21 | 57 | 88 | 94 | 59 | 1 | . | . | . | ||||||
| Meadow Brown | 231 | . | . | . | . | . | . | . | . | 1 | 18 | 34 | 38 | 28 | 24 | 21 | 12 | . | . | . | . | ||||||
| Ringlet | 62 | . | . | . | . | . | . | . | . | . | . | 5 | 15 | 20 | 14 | . | . | . | . | . | . | ||||||