
| 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 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 3 | . | . | . | ||||||||
| Dingy Skipper | NI | . | . | . | 3 | 5 | 14 | 13 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | NI | . | . | . | 2 | 4 | 9 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | NI | . | . | 2 | 5 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||||
| Large White | NI | . | . | . | 1 | 1 | . | 5 | 1 | 1 | . | . | 1 | 2 | 3 | 5 | 1 | 1 | . | ||||||||
| Small White | NI | . | . | 1 | 1 | 1 | 2 | 4 | 2 | . | . | 1 | . | . | 23 | 10 | 12 | 11 | 2 | ||||||||
| Green-veined White | NI | . | . | . | . | 1 | 1 | . | . | . | . | . | 2 | . | . | 10 | . | . | 1 | ||||||||
| Orange Tip | NI | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | NI | . | . | . | . | 3 | 4 | 3 | . | . | . | . | . | . | 4 | 1 | 3 | . | . | ||||||||
| Small Blue | NI | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brown Argus | NI | . | . | . | . | . | 4 | . | 1 | . | . | . | . | . | 1 | 4 | 4 | 3 | . | ||||||||
| Common Blue | NI | . | . | . | . | 15 | 22 | 27 | 32 | 11 | 1 | . | . | . | . | 4 | 22 | 13 | . | ||||||||
| Chalk-hill Blue | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | . | . | . | ||||||||
| Adonis Blue | NI | . | . | . | . | 2 | 14 | 75 | 2 | 4 | . | . | . | . | . | . | . | 7 | 1 | ||||||||
| Holly Blue | NI | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | NI | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||||||
| Painted Lady | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||||||
| Small Tortoiseshell | NI | . | . | 2 | 1 | . | . | 1 | 2 | . | . | . | 1 | 4 | 1 | . | 2 | 7 | . | ||||||||
| Peacock | NI | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Marsh Fritillary | NI | . | . | . | . | 1 | 9 | 9 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | NI | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | . | 1 | 1 | 3 | . | ||||||||
| Wall Brown | NI | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 3 | . | . | ||||||||
| Marbled White | NI | . | . | . | . | . | . | . | 1 | 1 | 34 | 16 | 71 | 50 | 12 | 2 | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 12 | 26 | . | . | . | ||||||||
| Meadow Brown | NI | . | . | . | . | . | . | . | 11 | 13 | 28 | 15 | 24 | 7 | 80 | 135 | 122 | 46 | 5 | ||||||||
| Small Heath | NI | . | . | . | . | 4 | 14 | 36 | 62 | 39 | 70 | 6 | 27 | 38 | 5 | . | 4 | 11 | . | ||||||||
| Ringlet | NI | . | . | . | . | . | . | . | 1 | 2 | 21 | 3 | 11 | 38 | . | . | . | . | . | ||||||||