
| 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 | 10 | 5 | 3 | 1 | . | . | . | . | . | |||||
| Large Skipper | 26 | . | . | . | . | . | . | . | . | . | . | . | 3 | 7 | 3 | 5 | . | . | . | . | . | . | |||||
| Brimstone | NI | 7 | 11 | 10 | 9 | . | . | 3 | 1 | . | 1 | . | . | . | 12 | 7 | 10 | 9 | 9 | 4 | 5 | 6 | |||||
| Large White | NI | . | . | . | . | . | . | 1 | 1 | 2 | . | . | . | 2 | 2 | . | . | 2 | 2 | 3 | 3 | 3 | |||||
| Small White | NI | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 1 | 2 | 3 | 6 | 4 | 1 | 2 | 4 | |||||
| Green-veined White | NI | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 2 | 2 | . | . | . | . | |||||
| Orange Tip | NI | 1 | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Small Copper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | |||||
| Holly Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | |||||
| White Admiral | 14 | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 4 | . | . | . | . | . | . | . | |||||
| Red Admiral | NI | 3 | 1 | . | 2 | . | . | 2 | . | . | 1 | . | 1 | 1 | 1 | 3 | 1 | . | 5 | 2 | 3 | 4 | |||||
| Painted Lady | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | 1 | |||||
| Small Tortoiseshell | NI | 1 | . | 1 | . | . | . | . | . | . | . | 2 | 1 | 2 | . | . | . | . | . | . | . | . | |||||
| Peacock | NI | 2 | 1 | 4 | 2 | . | . | . | . | . | . | . | . | 1 | 7 | 6 | 4 | 3 | 4 | 3 | 5 | 7 | |||||
| Comma | NI | 1 | 4 | . | . | . | . | . | . | . | . | 2 | 1 | 2 | . | 2 | 2 | 1 | 1 | 2 | 4 | 4 | |||||
| Pearl-bordered Fritillary | NI | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | 52 | . | . | . | . | . | . | . | . | . | . | . | . | 8 | 17 | 8 | 4 | 2 | . | . | . | . | |||||
| Speckled Wood | NI | . | 3 | 5 | 6 | . | . | 5 | 6 | 8 | 6 | 3 | . | 1 | 10 | 6 | 10 | 13 | 11 | 7 | 8 | 9 | |||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | 12 | 38 | 7 | 7 | 5 | 3 | 2 | . | . | . | |||||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | . | 11 | 12 | 15 | 63 | 15 | 5 | 4 | 2 | 4 | . | . | . | |||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | . | . | 7 | 15 | . | . | . | . | . | . | . | . | |||||