
| 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 | 6 | 9 | 20 | 14 | 27 | 9 | 7 | 1 | . | . | . | . | ||||||
| Large Skipper | 99 | . | . | . | . | . | . | . | 1 | 7 | 21 | 17 | 26 | 17 | 5 | 4 | . | . | . | . | . | ||||||
| Brimstone | 109 | 18 | 11 | 3 | 5 | 4 | 9 | 2 | . | . | . | . | . | 2 | 5 | 7 | 2 | 1 | 2 | 3 | 3 | ||||||
| Large White | 18 | . | 1 | 1 | . | . | . | . | . | 1 | . | . | . | . | . | 2 | 1 | 3 | 3 | . | 1 | ||||||
| Small White | 17 | . | . | . | . | . | . | . | . | . | . | 4 | 1 | 1 | . | 3 | 1 | . | 1 | 1 | 2 | ||||||
| Green-veined White | 4 | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Orange Tip | 4 | . | 2 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | 6 | . | . | . | . | . | . | 1 | . | . | . | . | 2 | . | . | 1 | . | . | . | . | . | ||||||
| Common Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | ||||||
| White Admiral | 29 | . | . | . | . | . | . | . | 2 | 5 | 6 | 6 | 9 | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 16 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 4 | 3 | 2 | ||||||
| Painted Lady | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Peacock | 20 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 1 | . | . | . | ||||||
| Comma | 10 | 1 | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | 1 | 1 | 1 | ||||||
| Pearl-bordered Fritillary | 3 | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Silver-washed Fritillary | 116 | . | . | . | . | . | . | . | 3 | 4 | 11 | 19 | 33 | 14 | 4 | 8 | 12 | . | . | . | . | ||||||
| Speckled Wood | 97 | 1 | 2 | 3 | 5 | 2 | 4 | 3 | 3 | 2 | 1 | 4 | . | 9 | 5 | 6 | 3 | 6 | 7 | 6 | 9 | ||||||
| Gatekeeper / Hedge Brown | 145 | . | . | . | . | . | . | . | . | 1 | 3 | 13 | 33 | 52 | 19 | 7 | 10 | . | . | . | . | ||||||
| Meadow Brown | 323 | . | . | . | . | . | . | . | 10 | 20 | 48 | 85 | 65 | 50 | 24 | 11 | 3 | . | . | . | . | ||||||
| Ringlet | 28 | . | . | . | . | . | . | . | . | 1 | 8 | 9 | 10 | . | . | . | . | . | . | . | . | ||||||