
| 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/Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 8 | . | . | . | . | . | ||||||||
| Large Skipper | NI | . | . | . | . | . | . | . | 3 | 7 | . | 14 | . | 23 | . | . | . | . | . | ||||||||
| Brimstone | NI | 6 | 10 | 10 | 12 | 11 | 8 | 2 | 1 | 1 | . | . | . | 7 | 12 | 3 | 4 | 3 | 2 | ||||||||
| Large White | NI | . | . | . | . | . | . | 3 | 3 | 3 | . | . | . | 1 | 2 | . | . | . | . | ||||||||
| Small White | NI | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | ||||||||
| Green-veined White | NI | . | . | 1 | 3 | 2 | 3 | 2 | 1 | 2 | . | . | . | 1 | 4 | . | . | . | . | ||||||||
| Orange Tip | 12 | 1 | . | 2 | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| Small Copper | NI | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Common Blue | NI | . | . | . | . | . | . | 2 | 1 | 4 | . | . | . | . | . | . | . | . | . | ||||||||
| Holly Blue | NI | . | 2 | 1 | 1 | 1 | . | . | . | . | . | . | . | 3 | 5 | . | . | . | . | ||||||||
| White Admiral | NI | . | . | . | . | . | . | . | . | . | . | 3 | . | 7 | . | . | . | . | . | ||||||||
| Red Admiral | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 6 | 6 | ||||||||
| Painted Lady | NI | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Small Tortoiseshell | NI | . | 1 | 1 | . | . | . | 3 | 2 | 3 | . | 3 | . | 5 | 3 | . | . | . | . | ||||||||
| Peacock | NI | 2 | 3 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Comma | NI | . | 2 | 1 | 2 | . | . | . | . | . | . | 1 | . | 3 | . | 1 | 3 | 2 | 1 | ||||||||
| Pearl-bordered Fritillary | 3 | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Silver-washed Fritillary | NI | . | . | . | . | . | . | . | . | . | . | 14 | . | 28 | 6 | . | . | . | . | ||||||||
| Speckled Wood | NI | 4 | 6 | 13 | 8 | 10 | 7 | 8 | 8 | . | . | 15 | . | . | 17 | 13 | 12 | 10 | 7 | ||||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | . | 27 | 79 | . | . | . | . | ||||||||
| Meadow Brown | NI | . | . | . | . | . | . | . | 2 | 2 | . | 39 | . | 36 | 16 | . | . | . | . | ||||||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | . | 10 | . | 14 | . | . | . | . | . | ||||||||