
| 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 | . | . | . | . | . | . | . | . | . | 19 | 5 | 7 | . | . | . | . | . | . | . | . | ||||||
| Large Skipper | 68 | . | . | . | . | . | . | 3 | 5 | 9 | 12 | 11 | 5 | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 76 | 3 | 4 | 7 | . | 3 | 1 | . | . | . | 1 | 2 | 10 | 18 | 8 | 4 | . | . | . | 2 | 1 | ||||||
| Large White | NI | . | . | . | . | . | . | 3 | . | . | . | . | 2 | 2 | 3 | . | . | 1 | 3 | . | 2 | ||||||
| Small White | NI | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 5 | 4 | 2 | 2 | 4 | . | 2 | 1 | ||||||
| Green-veined White | NI | . | . | . | . | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Orange Tip | NI | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | NI | . | . | . | . | . | 2 | . | . | . | . | . | . | . | 1 | 2 | 4 | 1 | 2 | . | . | ||||||
| Common Blue | NI | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Holly Blue | NI | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| White Admiral | 6 | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 45 | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 3 | 3 | 3 | 5 | 7 | 4 | 3 | 3 | ||||||
| Painted Lady | 17 | . | . | . | . | . | . | 3 | . | . | 1 | . | 2 | 1 | 1 | . | . | . | 1 | 2 | . | ||||||
| Small Tortoiseshell | 36 | . | 1 | 2 | . | 1 | . | . | . | . | . | 3 | 6 | 5 | 6 | 5 | 3 | . | . | . | . | ||||||
| Peacock | 29 | . | . | 2 | . | . | . | . | . | . | . | . | 9 | 6 | 4 | 2 | . | 2 | . | 1 | . | ||||||
| Comma | 21 | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | 3 | 3 | 2 | 1 | 2 | 2 | 1 | . | ||||||
| Pearl-bordered Fritillary | NI | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Silver-washed Fritillary | 54 | . | . | . | . | . | . | . | . | 3 | 16 | 13 | 3 | . | . | . | . | . | . | . | . | ||||||
| Speckled Wood | 217 | 5 | 6 | 7 | . | 4 | . | 7 | 6 | 12 | 3 | . | 8 | 15 | 19 | 17 | 25 | 15 | 15 | 9 | 12 | ||||||
| Gatekeeper / Hedge Brown | 235 | . | . | . | . | . | . | . | . | . | 40 | 36 | 44 | 28 | 16 | 12 | . | . | . | . | . | ||||||
| Meadow Brown | 234 | . | . | . | . | . | . | . | 18 | 26 | 33 | 38 | 34 | 8 | 9 | 4 | . | . | . | . | . | ||||||
| Ringlet | 51 | . | . | . | . | . | . | . | 4 | 6 | 27 | . | 1 | . | . | . | . | . | . | . | . | ||||||