
| 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 | . | . | . | . | . | . | . | 8 | 50 | 86 | 100 | 70 | 70 | 28 | 6 | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | 2 | 6 | 38 | 18 | 26 | 24 | . | 2 | 6 | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | ||||||
| Brimstone | 40 | 16 | 24 | 22 | 6 | 18 | 2 | 2 | 4 | 6 | 10 | 8 | 24 | 24 | 10 | 6 | 2 | . | 2 | . | ||||||
| Large White | 14 | . | . | 4 | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | ||||||
| Small White | . | 4 | 4 | 4 | 2 | 2 | . | . | 2 | 6 | 44 | 60 | 26 | 26 | 8 | 2 | 4 | . | . | . | ||||||
| Green-veined White | . | 14 | 10 | 2 | . | . | . | . | 2 | 6 | . | 30 | 14 | 2 | . | . | 2 | . | 2 | . | ||||||
| Orange Tip | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | 6 | 4 | 26 | 8 | 18 | 10 | 18 | 12 | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 2 | . | . | ||||||
| Common Blue | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 4 | 2 | 2 | . | . | . | . | ||||||
| Holly Blue | 2 | . | . | 4 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||||
| White Admiral | . | . | . | . | . | . | . | . | 2 | 4 | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | 2 | . | 4 | 6 | . | . | 2 | . | . | 2 | 2 | 2 | . | . | ||||||
| Painted Lady | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | 2 | 8 | 2 | . | . | . | . | ||||||
| Small Tortoiseshell | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | ||||||
| Peacock | 8 | 4 | 2 | . | . | . | . | . | . | . | . | 4 | 4 | 16 | 2 | 2 | . | . | . | . | ||||||
| Comma | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | 2 | . | 2 | . | . | ||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | 2 | . | 2 | . | . | . | . | . | . | . | . | . | ||||||
| Speckled Wood | 12 | 4 | 6 | 18 | 8 | 8 | 6 | 6 | 14 | 16 | 42 | 22 | 24 | 36 | 68 | 50 | 28 | 10 | 4 | 2 | ||||||
| Marbled White | . | . | . | . | . | . | 4 | 24 | 44 | 34 | 10 | 8 | 2 | . | . | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 4 | 4 | 102 | 150 | 114 | 100 | 54 | 24 | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | 4 | 60 | 66 | 46 | 56 | 78 | 50 | 52 | 32 | 16 | 8 | . | . | . | . | ||||||
| Ringlet | . | . | . | . | . | . | 26 | 54 | 76 | 88 | 50 | 22 | . | . | . | . | . | . | . | . | ||||||