
| 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 | . | . | . | . | . | . | . | . | . | 4 | 13 | 41 | 7 | . | . | . | . | . | . | . | . | |||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | 1 | 3 | 23 | 46 | 6 | . | . | . | . | . | . | . | . | |||||
| Brimstone | 87 | . | . | 5 | 7 | 11 | 14 | 3 | 1 | . | . | . | . | 7 | 19 | 9 | 7 | . | . | . | . | . | |||||
| Large White | 37 | . | . | . | 1 | 3 | 3 | 2 | 5 | 2 | . | . | 2 | 4 | 5 | 2 | 2 | 1 | . | . | . | . | |||||
| Small White | 22 | . | . | . | . | . | 1 | 2 | 2 | 2 | . | . | 2 | 1 | 6 | 2 | 1 | 1 | . | . | . | . | |||||
| Green-veined White | 28 | . | . | 1 | 3 | 3 | 2 | 4 | 5 | 2 | . | . | . | 1 | . | 1 | 3 | . | . | . | . | . | |||||
| Orange Tip | 5 | . | . | . | 1 | . | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Common Blue | 10 | . | . | . | . | . | . | . | 4 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Holly Blue | 27 | . | . | . | 3 | 3 | 5 | . | . | . | . | 1 | 1 | 2 | 3 | 2 | 4 | . | . | . | . | . | |||||
| White Admiral | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 11 | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | . | 1 | 1 | . | 1 | 1 | . | |||||
| Small Tortoiseshell | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Peacock | 38 | . | . | 1 | 1 | 2 | . | . | . | . | . | . | . | 7 | 8 | 5 | 7 | 2 | 1 | . | 1 | . | |||||
| Comma | 13 | . | . | 1 | . | 1 | . | . | . | . | . | 1 | 1 | . | . | 1 | 2 | 1 | . | 2 | 1 | 1 | |||||
| Pearl-bordered Fritillary | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | 70 | . | . | . | . | . | . | . | . | . | . | 10 | 31 | 5 | 4 | . | . | . | . | . | . | . | |||||
| Speckled Wood | 217 | . | . | 4 | 5 | 10 | 5 | 10 | 12 | 14 | 9 | 7 | 12 | 11 | 13 | 11 | 10 | 18 | 10 | 8 | 5 | 3 | |||||
| Gatekeeper / Hedge Brown | 115 | . | . | . | . | . | . | . | . | . | 2 | 12 | 23 | 17 | 16 | 7 | 6 | . | . | . | . | . | |||||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | 3 | 20 | 62 | 104 | 13 | 14 | 4 | 1 | 1 | 1 | . | . | . | |||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 2 | . | . | . | . | . | . | . | . | |||||