
| 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 | ||||||||||||||||||||||||||
| Large Skipper | NI | . | . | . | . | . | . | . | 7 | 11 | 24 | 37 | 21 | 20 | 2 | 1 | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | NI | . | . | . | 1 | . | 3 | 3 | 6 | 3 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | NI | 5 | 1 | . | 1 | . | . | 1 | 1 | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | |||
| Large White | NI | . | . | . | . | . | . | 2 | . | 1 | 2 | . | . | . | 1 | 4 | 2 | . | 2 | 2 | . | 1 | . | . | |||
| Small White | NI | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | 4 | 4 | 7 | 6 | . | 2 | |||
| Green-veined White | NI | . | . | . | 6 | 1 | 8 | 4 | . | . | 2 | . | 2 | 4 | 11 | 21 | 14 | 6 | 3 | 9 | 4 | 3 | 1 | 1 | |||
| Orange Tip | NI | . | . | . | 5 | 1 | 6 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | NI | . | . | 1 | . | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Purple Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | 1 | . | . | . | . | . | |||
| Small Copper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||
| Northern Brown Argus | NI | . | . | . | . | . | . | . | . | . | 14 | 34 | 24 | 24 | 14 | 10 | 3 | 2 | 6 | 2 | . | . | . | . | |||
| Common Blue | NI | . | . | . | . | . | . | . | 2 | 3 | 20 | 38 | 17 | 19 | 8 | 5 | 3 | 1 | 9 | 4 | 1 | 3 | 1 | . | |||
| Holly Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||
| Duke of Burgundy Fritillary | NI | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | 7 | 11 | 4 | 6 | 17 | 13 | 30 | 9 | 9 | |||
| Painted Lady | NI | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | 1 | 1 | 2 | 1 | . | . | |||
| Small Tortoiseshell | NI | . | . | . | 1 | . | . | . | . | . | . | 1 | 1 | 5 | 5 | 9 | . | 3 | 21 | 9 | 4 | 1 | . | . | |||
| Peacock | NI | . | 5 | 4 | 7 | 1 | 1 | 2 | 1 | 1 | 1 | . | . | . | . | 12 | 31 | 16 | 7 | 2 | . | 2 | . | . | |||
| Comma | NI | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | |||
| Small Pearl-bordered Fritillary | NI | . | . | . | . | . | . | . | 12 | 11 | 13 | 8 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | |||
| Pearl-bordered Fritillary | NI | . | . | . | 40 | 32 | 40 | 58 | 31 | 13 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| High Brown Fritillary | NI | . | . | . | . | . | . | . | . | . | 2 | 27 | 69 | 61 | 27 | 21 | 18 | 1 | . | . | . | . | . | . | |||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | |||
| Silver-washed Fritillary | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||
| Wall Brown | NI | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 2 | 2 | . | 2 | . | . | . | |||
| Grayling | NI | . | . | . | . | . | . | . | . | . | . | 7 | 14 | 21 | 19 | 14 | 3 | . | . | . | . | . | . | . | |||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | . | 9 | 41 | 90 | 77 | 73 | 88 | 26 | 1 | 5 | 1 | . | . | . | . | |||