
| 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 | . | . | . | . | . | . | . | . | 6 | 10 | 14 | 10 | 12 | 1 | . | . | . | . | . | . | . | |||||
| Large Skipper | 76 | . | . | . | . | . | . | 1 | 7 | 15 | 11 | 17 | 6 | 3 | 3 | 1 | 1 | . | . | . | . | . | |||||
| Grizzled Skipper | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 118 | 15 | 15 | 7 | 5 | 2 | 2 | 2 | . | . | . | . | 6 | 6 | 10 | 6 | 3 | . | 6 | 6 | 10 | 3 | |||||
| Large White | 58 | . | . | 1 | 1 | 2 | 5 | 1 | . | . | . | 1 | 13 | 21 | 4 | 5 | 3 | . | . | . | . | . | |||||
| Small White | 170 | . | 4 | 5 | 7 | 6 | 1 | 6 | . | . | 1 | 4 | 12 | 15 | 33 | 25 | 9 | 11 | 4 | 5 | 7 | 2 | |||||
| Green-veined White | 153 | . | . | 10 | 7 | 16 | 4 | 8 | 1 | . | . | . | 1 | 13 | 21 | 28 | 18 | 12 | 1 | . | . | . | |||||
| Orange Tip | 54 | 3 | 14 | 9 | 3 | 9 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 4 | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 1 | . | . | . | . | . | . | . | . | |||||
| Small Copper | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | |||||
| Duke of Burgundy Fritillary | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| White Admiral | 23 | . | . | . | . | . | . | . | . | 3 | 4 | 4 | 1 | 7 | 2 | . | . | . | . | . | . | . | |||||
| Purple Emperor | 2 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 83 | 1 | . | . | . | 2 | 2 | 1 | 3 | 3 | 1 | 6 | 8 | 8 | 7 | 8 | 4 | 6 | 5 | 2 | 5 | 2 | |||||
| Painted Lady | 4 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | |||||
| Small Tortoiseshell | 29 | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | 2 | 3 | 2 | 5 | 1 | 2 | 1 | 2 | 3 | 1 | |||||
| Peacock | 68 | 2 | 5 | . | 1 | . | 1 | . | . | . | . | . | 6 | 16 | 12 | 11 | 2 | 1 | 1 | 2 | 3 | 1 | |||||
| Comma | 40 | 1 | 1 | . | . | . | . | . | . | 2 | 4 | 6 | 2 | 4 | 3 | 4 | . | . | 1 | 1 | 5 | 3 | |||||
| Pearl-bordered Fritillary | 12 | . | . | . | 7 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dark Green Fritillary | 2 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | 91 | . | . | . | . | . | . | . | 3 | 6 | 9 | 24 | 20 | 8 | 11 | 5 | . | . | . | . | . | . | |||||
| Heath Fritillary | NI | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 400 | . | 4 | 4 | 9 | 6 | 10 | 8 | 27 | 12 | 6 | 10 | 10 | 18 | 25 | 30 | 25 | 23 | 38 | 37 | 29 | 14 | |||||
| Wall Brown | 17 | . | . | . | 1 | 2 | . | . | . | . | 2 | . | . | . | . | 2 | 4 | 4 | . | . | . | . | |||||
| Marbled White | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 241 | . | . | . | . | . | . | . | . | 1 | . | 8 | 41 | 48 | 65 | 44 | 21 | 8 | . | . | . | . | |||||
| Meadow Brown | 169 | . | . | . | . | . | . | . | . | 19 | 22 | 40 | 29 | 33 | 5 | 4 | 6 | 1 | . | . | . | . | |||||
| Ringlet | 149 | . | . | . | . | . | . | . | . | 15 | 24 | 52 | 24 | 17 | 4 | 5 | . | . | . | . | . | . | |||||