
| 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 | ||||||||||||||||||||||||||
| Small Skipper | . | . | . | . | . | . | . | . | 3 | . | 2 | 27 | 25 | 9 | 2 | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | 1 | . | 1 | 2 | 3 | 4 | 2 | 2 | . | . | . | . | . | . | . | . | ||||||
| Brimstone | . | 2 | 1 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | ||||||
| Large White | . | . | 2 | 1 | 1 | . | 1 | . | . | 1 | . | 13 | 8 | 15 | 8 | 5 | . | . | . | . | ||||||
| Small White | . | . | . | . | . | . | 1 | . | . | 14 | 24 | 57 | 96 | 113 | 165 | 273 | 290 | 102 | 66 | 30 | ||||||
| Green-veined White | . | 1 | 6 | 6 | 8 | 7 | 3 | . | . | 14 | 18 | 30 | 19 | 24 | 11 | 8 | 17 | 4 | 2 | 3 | ||||||
| Orange Tip | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | 2 | 1 | 5 | 6 | 5 | 2 | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 3 | 4 | 1 | 5 | 11 | ||||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | 1 | . | . | ||||||
| Red Admiral | 1 | . | . | . | . | . | . | . | 6 | 4 | 7 | 4 | 3 | 1 | 2 | . | 7 | 10 | 29 | 21 | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | 1 | 1 | . | . | . | 1 | . | . | ||||||
| Small Tortoiseshell | 6 | 3 | 5 | . | . | 1 | 5 | 30 | 77 | 46 | 19 | 20 | 6 | 29 | 38 | 13 | 6 | 2 | 11 | 4 | ||||||
| Peacock | 3 | 3 | 5 | 2 | 2 | . | . | . | . | . | 7 | 21 | 9 | 1 | . | . | . | . | . | . | ||||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | ||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | . | . | . | . | . | . | . | ||||||
| Speckled Wood | . | . | 1 | 8 | 7 | 17 | 9 | 8 | . | . | . | 4 | 8 | 13 | 57 | 35 | 76 | 37 | 23 | 6 | ||||||
| Wall Brown | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 6 | 3 | . | 1 | . | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 2 | 27 | 63 | 80 | 55 | 38 | 14 | 1 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | 8 | 3 | 25 | 46 | 30 | 65 | 46 | 28 | 4 | 2 | . | . | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 7 | 29 | 42 | 59 | 41 | 5 | 1 | . | . | . | . | . | ||||||