
| 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 | . | . | . | . | . | . | 2 | 6 | 14 | 8 | 7 | 3 | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | NI | . | . | . | . | 13 | 19 | 22 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | NI | . | 8 | 1 | 16 | 12 | 3 | 3 | 2 | . | . | . | 1 | 6 | 11 | 5 | 4 | 3 | 2 | . | 3 | . | |||||
| Large White | NI | . | . | . | . | 1 | 1 | 2 | . | . | . | . | 2 | 4 | 3 | 1 | . | . | . | . | . | . | |||||
| Small White | NI | . | . | . | . | . | . | . | 1 | . | . | 7 | 4 | 3 | 4 | . | . | 1 | . | . | . | . | |||||
| Green-veined White | NI | 1 | 2 | 15 | 8 | 15 | 4 | 4 | 1 | 1 | 2 | 16 | 11 | 10 | 3 | 5 | 3 | 1 | . | . | . | . | |||||
| Orange Tip | NI | . | 1 | 4 | 6 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | NI | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Northern Brown Argus | NI | . | . | . | . | . | . | . | 2 | 13 | 8 | 8 | 8 | 3 | . | . | . | . | . | . | . | . | |||||
| Common Blue | NI | . | . | . | . | . | 1 | . | 1 | 3 | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | |||||
| Duke of Burgundy Fritillary | NI | . | . | . | 1 | 4 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | NI | . | . | . | . | . | . | . | . | 4 | 2 | 1 | . | . | . | . | . | . | . | 1 | 4 | 1 | |||||
| Painted Lady | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | |||||
| Small Tortoiseshell | NI | . | . | . | . | . | . | . | . | . | . | 5 | 6 | 1 | . | . | . | . | . | . | . | . | |||||
| Peacock | NI | 4 | 14 | 11 | 5 | 4 | 2 | 1 | . | . | . | . | . | 41 | 53 | 17 | 4 | 1 | . | 1 | . | 1 | |||||
| Comma | NI | . | 2 | 1 | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | 1 | |||||
| Small Pearl-bordered Fritillary | NI | . | . | . | . | . | 2 | 12 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Pearl-bordered Fritillary | NI | . | . | . | 3 | 50 | 34 | 18 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| High Brown Fritillary | NI | . | . | . | . | . | . | . | 1 | 26 | 20 | 31 | 19 | 23 | 11 | 2 | . | . | . | . | . | . | |||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | NI | . | . | 4 | 3 | 7 | 4 | 2 | 8 | 12 | 11 | 15 | 6 | 6 | 9 | 3 | 3 | 4 | 10 | 12 | 12 | 24 | |||||
| Wall Brown | NI | . | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | 1 | 2 | 1 | 2 | . | . | . | |||||
| Grayling | NI | . | . | . | . | . | . | . | . | 13 | 25 | 43 | 27 | 22 | 6 | 1 | . | . | . | . | . | . | |||||
| Meadow Brown | NI | . | . | . | . | . | . | . | 2 | 80 | 102 | 84 | 80 | 44 | 20 | 7 | 6 | 3 | . | . | . | . | |||||
| Small Heath | NI | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||