
| 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 | . | . | . | . | . | . | . | 3 | 5 | 6 | 16 | 20 | 8 | 4 | . | . | . | . | . | . | . | |||||
| Large Skipper | 69 | . | . | . | . | . | . | . | . | 3 | 4 | 15 | 30 | 7 | 6 | . | . | . | . | . | . | . | |||||
| Brimstone | 90 | 4 | 6 | 8 | 5 | 6 | 6 | 8 | 1 | . | . | 4 | . | 4 | 6 | 1 | . | 1 | 2 | 2 | 1 | 1 | |||||
| Large White | 11 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 3 | 2 | . | . | |||||
| Small White | 18 | . | . | . | 1 | 2 | . | . | . | . | . | 3 | 1 | 2 | 1 | . | 2 | . | 1 | 2 | . | . | |||||
| Green-veined White | 6 | . | . | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | |||||
| Orange Tip | 12 | . | . | 2 | 3 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Holly Blue | NI | . | . | 1 | . | 1 | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | |||||
| White Admiral | 7 | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 1 | 1 | . | . | . | . | . | . | . | |||||
| Red Admiral | 19 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | 2 | 1 | 4 | 3 | 2 | 4 | |||||
| Small Tortoiseshell | 5 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | |||||
| Peacock | 37 | 2 | 3 | 2 | 2 | 1 | 3 | 2 | . | . | . | . | 1 | 3 | 3 | 1 | 1 | . | . | 2 | . | 2 | |||||
| Comma | 11 | . | 1 | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | 1 | 2 | 1 | 1 | |||||
| Pearl-bordered Fritillary | 3 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | 57 | . | . | . | . | . | . | . | . | . | . | 7 | 14 | 14 | 13 | . | . | . | . | . | . | . | |||||
| Speckled Wood | 133 | 3 | 2 | 4 | . | . | 5 | 11 | 5 | 4 | 9 | 6 | 10 | 6 | 9 | 3 | 5 | 8 | 6 | 4 | 3 | 4 | |||||
| Gatekeeper / Hedge Brown | 109 | . | . | . | . | . | . | . | . | . | . | 11 | 20 | 35 | 28 | . | . | . | . | . | . | . | |||||
| Meadow Brown | 264 | . | . | . | . | . | . | . | . | 7 | 28 | 36 | 69 | 41 | 41 | 4 | 2 | . | . | . | . | . | |||||
| Ringlet | 35 | . | . | . | . | . | . | . | . | . | . | 8 | 13 | 6 | 5 | . | . | . | . | . | . | . | |||||