
| 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 | . | . | . | . | . | . | . | . | . | . | 7 | 10 | 26 | 22 | 13 | 7 | 4 | . | . | . | . | |||||
| Large Skipper | 15 | . | . | . | . | . | . | . | . | 3 | 4 | 3 | . | . | 1 | 1 | . | . | . | . | . | . | |||||
| Dingy Skipper | NI | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | NI | . | . | . | 1 | 2 | 5 | 15 | 16 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 25 | 8 | . | 1 | 3 | 5 | 1 | . | . | . | . | . | . | . | 3 | . | . | 1 | . | . | . | . | |||||
| Large White | NI | . | . | . | . | 4 | 4 | 4 | 1 | 2 | . | 1 | 4 | 9 | 7 | 1 | 3 | 2 | 3 | . | 1 | . | |||||
| Small White | NI | . | . | . | 1 | 2 | 1 | 3 | 3 | 1 | . | 2 | 2 | 5 | 4 | 2 | 2 | 2 | . | 1 | . | 2 | |||||
| Green-veined White | NI | . | . | 1 | 1 | 1 | . | 4 | 4 | 1 | . | 1 | 2 | 7 | 2 | 3 | 1 | 1 | . | . | . | . | |||||
| Orange Tip | 13 | . | 1 | . | 1 | 4 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 12 | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 4 | 2 | . | . | . | . | . | . | |||||
| Small Copper | NI | . | . | . | . | . | . | 2 | . | . | . | . | . | . | 1 | 5 | 7 | 6 | 1 | 1 | . | . | |||||
| Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | . | . | . | . | |||||
| Common Blue | 32 | . | . | . | . | . | . | . | . | 4 | 4 | 1 | 1 | . | . | 5 | 4 | 5 | 3 | . | . | . | |||||
| Holly Blue | 11 | . | . | 1 | . | 1 | 2 | 1 | . | . | . | . | . | . | 1 | 1 | . | 1 | 1 | . | . | . | |||||
| Duke of Burgundy Fritillary | NI | . | . | . | . | . | . | 6 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| White Admiral | 6 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | 1 | . | . | . | . | . | . | . | |||||
| Red Admiral | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | |||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||
| Small Tortoiseshell | 31 | . | . | . | . | 1 | . | . | . | . | . | 2 | 4 | 1 | 3 | . | 1 | 5 | 7 | 2 | . | 3 | |||||
| Peacock | 160 | 19 | 10 | 11 | 7 | 12 | 6 | 8 | . | . | . | . | . | 1 | 37 | 15 | 2 | 1 | . | . | . | 1 | |||||
| Comma | 57 | 11 | 2 | 2 | 1 | 1 | . | . | . | . | . | 6 | 1 | 4 | . | . | 1 | . | 2 | 6 | 10 | 10 | |||||
| Pearl-bordered Fritillary | NI | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | 65 | . | . | . | . | . | . | . | . | . | . | 1 | 13 | 14 | 10 | 11 | 5 | . | . | . | . | . | |||||
| Speckled Wood | 67 | . | . | . | . | 1 | 1 | 1 | 1 | 3 | 1 | . | . | 1 | 3 | 10 | 3 | 5 | 10 | 5 | 1 | 4 | |||||
| Marbled White | 10 | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 4 | . | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 258 | . | . | . | . | . | . | . | . | . | . | . | 9 | 20 | 47 | 49 | 53 | 27 | 5 | . | . | . | |||||
| Meadow Brown | 588 | . | . | . | . | . | . | . | . | 4 | 38 | 109 | 148 | 116 | 72 | 30 | 12 | 5 | 1 | . | . | . | |||||
| Small Heath | NI | . | . | . | . | . | . | . | . | 3 | . | . | 2 | . | . | . | . | . | . | . | . | . | |||||
| Ringlet | 158 | . | . | . | . | . | . | . | . | 3 | 24 | 76 | 33 | 11 | 5 | 1 | . | . | . | . | . | . | |||||