
| 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 | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | 2 | . | . | . | . | . | . | . | ||||||
| Large Skipper | NI | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | NI | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 56 | 4 | 5 | 4 | 4 | 7 | 3 | 1 | . | . | . | 1 | . | 4 | 3 | 1 | . | . | 1 | . | 1 | ||||||
| Large White | NI | . | . | 1 | 1 | 9 | 4 | 2 | 1 | 1 | 2 | 2 | 4 | 1 | . | 1 | . | 1 | . | . | . | ||||||
| Small White | NI | . | . | 1 | 4 | 1 | . | . | . | . | . | 8 | 23 | 7 | 5 | 1 | 1 | . | 1 | . | 1 | ||||||
| Green-veined White | NI | . | . | 8 | 12 | 11 | 4 | 4 | 1 | . | 2 | 1 | 1 | 24 | 22 | 8 | 6 | 1 | 3 | 2 | . | ||||||
| Orange Tip | NI | 2 | 9 | 12 | 10 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Blue | NI | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | NI | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Common Blue | 10 | . | . | . | . | 2 | 1 | 2 | . | . | . | 1 | . | . | . | 2 | . | . | . | . | . | ||||||
| Holly Blue | 22 | 1 | 3 | 2 | 2 | 1 | . | . | . | . | . | 1 | 2 | 3 | . | . | . | . | 2 | . | . | ||||||
| Red Admiral | 13 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | 1 | 2 | . | . | 2 | . | 2 | ||||||
| Small Tortoiseshell | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | ||||||
| Peacock | 67 | 10 | 8 | 2 | 5 | 1 | . | . | . | . | . | . | 4 | 13 | 9 | . | . | . | . | . | . | ||||||
| Comma | 8 | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 2 | 2 | . | ||||||
| Silver-washed Fritillary | 17 | . | . | . | . | . | . | . | . | . | 1 | 4 | 6 | 5 | 1 | . | . | . | . | . | . | ||||||
| Speckled Wood | 96 | . | 1 | 2 | 2 | 5 | 9 | 5 | 2 | 2 | 3 | . | 2 | 2 | 4 | 8 | 9 | 3 | 7 | 3 | 6 | ||||||
| Marbled White | 66 | . | . | . | . | . | . | . | . | 6 | 16 | 25 | 10 | 6 | . | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 87 | . | . | . | . | . | . | . | . | . | . | 6 | 20 | 34 | 22 | 3 | . | . | . | . | . | ||||||
| Meadow Brown | 273 | . | . | . | . | . | . | 1 | 18 | 22 | 51 | 41 | 42 | 31 | 10 | 10 | 1 | . | . | . | . | ||||||
| Ringlet | 66 | . | . | . | . | . | . | . | 1 | 6 | 20 | 21 | 9 | 2 | . | . | . | . | . | . | . | ||||||