
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | ||||
| Silver-spotted Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 4 | 4 | 10 | 2 | 6 | . | . | . | ||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | NI | . | . | . | 2 | 4 | 21 | 3 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | NI | . | . | 1 | 8 | 8 | 7 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | NI | . | 1 | 3 | 2 | 3 | 2 | . | 2 | 1 | . | . | . | . | . | . | . | 2 | 4 | . | 1 | 1 | . | ||||
| Large White | NI | . | . | 1 | 1 | 3 | 1 | 1 | . | 1 | . | 1 | . | 2 | 4 | 6 | 2 | 2 | 2 | . | . | . | . | ||||
| Small White | NI | . | . | 1 | . | . | 1 | . | 1 | . | . | . | . | 2 | 1 | 2 | . | . | . | . | 1 | . | . | ||||
| Green-veined White | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||
| Green Hairstreak | NI | . | . | 1 | 9 | 8 | 6 | 5 | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | NI | . | . | . | . | 5 | 3 | 2 | 1 | . | . | . | . | 1 | . | 1 | . | 5 | . | . | . | . | . | ||||
| Brown Argus | NI | . | . | . | 2 | 4 | 11 | 6 | 8 | 3 | . | . | . | . | . | . | . | . | 13 | 4 | 1 | 2 | 2 | ||||
| Common Blue | NI | . | . | . | . | 3 | 50 | 8 | 50 | 18 | 7 | 4 | 2 | . | 2 | 5 | 8 | 43 | 40 | 22 | 24 | 21 | 8 | ||||
| Chalk-hill Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | . | . | . | . | . | ||||
| Adonis Blue | NI | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Duke of Burgundy Fritillary | NI | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | ||||
| Peacock | NI | 1 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | 4 | 2 | 20 | 3 | 16 | 10 | 3 | 1 | 1 | . | . | . | . | . | ||||
| Speckled Wood | NI | . | . | . | 1 | 1 | . | 1 | 1 | 1 | 2 | . | . | . | . | 1 | 2 | . | . | . | . | 2 | . | ||||
| Marbled White | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | 5 | 3 | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 4 | 2 | . | . | . | . | . | . | ||||
| Meadow Brown | NI | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | 22 | 366 | 556 | 501 | 323 | 289 | 104 | 79 | 70 | ||||
| Small Heath | NI | . | . | . | 1 | 2 | 4 | 1 | 9 | 14 | 18 | 22 | 7 | 10 | 9 | 7 | 27 | 9 | 6 | 5 | 4 | 6 | 7 | ||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | . | 5 | 3 | 5 | . | . | . | 2 | . | . | . | . | . | ||||