
| 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 | . | . | . | . | . | . | . | . | . | 31 | 33 | 23 | 9 | 12 | . | . | . | . | . | |||||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | 20 | 1 | 1 | 1 | . | 1 | . | . | . | . | . | |||||||
| Dingy Skipper | NI | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||
| Brimstone | NI | 15 | 2 | 6 | 9 | 7 | 3 | 1 | 6 | 1 | . | 8 | 12 | 11 | 35 | 40 | 9 | 2 | . | . | |||||||
| Large White | NI | . | . | . | . | . | . | . | . | . | 1 | 3 | 6 | 5 | 2 | 3 | 1 | 2 | 1 | . | |||||||
| Small White | NI | . | . | 1 | . | . | . | . | . | . | 8 | 11 | 16 | 7 | 11 | . | 38 | 27 | 14 | . | |||||||
| Green-veined White | NI | . | 1 | 3 | 1 | 1 | . | . | . | . | . | . | 3 | 3 | 1 | . | 2 | . | 2 | 1 | |||||||
| Orange Tip | NI | . | . | 8 | 3 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | NI | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||
| Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | 1 | . | . | . | |||||||
| Common Blue | NI | . | . | . | . | . | . | . | . | 2 | . | . | . | . | 3 | 2 | 1 | . | . | . | |||||||
| Holly Blue | NI | . | . | 1 | 1 | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||
| Duke of Burgundy Fritillary | NI | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| White Admiral | NI | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | |||||||
| Red Admiral | NI | . | 1 | . | . | 1 | . | . | . | . | 2 | 2 | 2 | . | . | . | 2 | 7 | 5 | 1 | |||||||
| Painted Lady | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||
| Small Tortoiseshell | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | |||||||
| Peacock | NI | 2 | 1 | 1 | . | 1 | . | . | . | . | . | . | 5 | 9 | 15 | 2 | . | . | . | . | |||||||
| Comma | NI | 3 | . | . | . | . | . | . | . | . | . | 6 | 5 | . | . | . | 2 | 17 | 14 | 2 | |||||||
| Small Pearl-bordered Fritillary | NI | . | . | . | . | 5 | 7 | 11 | 7 | 5 | . | . | . | . | . | . | . | . | . | . | |||||||
| Pearl-bordered Fritillary | NI | . | . | 13 | 34 | 37 | 6 | 1 | 6 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | NI | . | . | . | . | . | . | . | . | 3 | 28 | 31 | 38 | 43 | 58 | 28 | 7 | . | . | . | |||||||
| Speckled Wood | NI | . | . | 3 | 5 | 4 | 3 | 4 | 8 | 5 | . | 1 | 1 | . | 2 | 4 | 12 | 9 | 11 | . | |||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | . | 3 | 3 | 3 | . | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | 21 | 75 | 86 | 105 | 83 | 28 | 2 | . | . | . | |||||||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | 5 | 36 | 22 | 33 | 52 | 16 | 7 | 2 | 1 | . | 2 | |||||||
| Ringlet | NI | . | . | . | . | . | . | . | . | 2 | 109 | 74 | 28 | 10 | 2 | . | . | . | . | . | |||||||