
| 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 | 13 | 40 | 57 | 28 | 15 | 1 | 1 | . | . | . | ||||||
| Large Skipper | 35 | . | . | . | . | . | . | 2 | 5 | 7 | 10 | 6 | 1 | 4 | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | 50 | . | . | . | 5 | 12 | 15 | 8 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | 6 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 2 | 2 | 1 | . | . | . | . | ||||||
| Brimstone | 26 | 2 | 2 | 2 | 1 | 2 | 1 | . | . | . | . | . | . | . | 2 | 2 | 2 | . | 2 | 1 | 1 | ||||||
| Large White | 6 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 2 | . | . | . | . | . | ||||||
| Small White | NI | . | . | 1 | . | 1 | . | . | . | . | . | 1 | 3 | 4 | 12 | 7 | 2 | . | 3 | 2 | . | ||||||
| Green-veined White | NI | . | 1 | 1 | 2 | 3 | 1 | . | . | . | . | . | 1 | 4 | 9 | 5 | 1 | 3 | 1 | . | . | ||||||
| Orange Tip | 17 | 2 | 4 | 3 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | 7 | . | . | . | . | . | . | . | . | . | . | . | 4 | 3 | . | . | . | . | . | . | . | ||||||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||
| Small Copper | 41 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 7 | 7 | 6 | 6 | 6 | . | 1 | ||||||
| Brown Argus | 16 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 5 | 4 | 2 | . | . | ||||||
| Common Blue | 150 | . | . | . | . | . | . | 8 | 6 | 4 | 3 | . | 1 | 1 | 7 | 19 | 30 | 44 | 15 | 2 | . | ||||||
| White Admiral | 23 | . | . | . | . | . | . | . | . | . | . | 9 | 9 | 3 | 1 | 1 | . | . | . | . | . | ||||||
| Red Admiral | 44 | 1 | . | 1 | . | . | . | . | . | . | . | 1 | 1 | 1 | 6 | 8 | 9 | 9 | 2 | . | 2 | ||||||
| Painted Lady | 103 | . | . | . | . | 2 | 6 | 1 | 1 | 1 | 1 | . | 5 | 5 | 45 | 25 | 5 | 6 | . | . | . | ||||||
| Small Tortoiseshell | 23 | 1 | 2 | . | . | 1 | . | . | . | . | . | 7 | 5 | 1 | . | 1 | 1 | . | 1 | 1 | . | ||||||
| Peacock | 156 | 18 | 18 | 10 | 1 | 3 | . | . | . | . | . | . | . | 8 | 42 | 26 | 10 | 2 | 2 | 2 | . | ||||||
| Comma | 42 | 4 | . | 1 | . | . | . | . | . | . | 1 | 4 | . | . | 2 | 2 | 1 | . | 1 | 8 | 5 | ||||||
| Silver-washed Fritillary | 126 | . | . | . | . | . | . | . | . | 1 | 3 | 11 | 22 | 21 | 32 | 22 | 11 | 1 | 1 | . | . | ||||||
| Speckled Wood | 78 | . | . | . | . | . | . | 3 | 3 | 2 | 1 | 1 | 1 | . | 1 | 1 | 1 | 4 | 16 | 13 | 6 | ||||||
| Marbled White | 36 | . | . | . | . | . | . | . | . | 1 | 3 | 8 | 10 | 9 | 3 | 2 | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 430 | . | . | . | . | . | . | . | . | . | . | 4 | 32 | 126 | 109 | 77 | 45 | 29 | 5 | . | . | ||||||
| Meadow Brown | 528 | . | . | . | . | . | . | . | 7 | 16 | 26 | 210 | 94 | 73 | 44 | 32 | 17 | 9 | . | . | . | ||||||
| Ringlet | 147 | . | . | . | . | . | . | . | . | 9 | 19 | 50 | 32 | 22 | 10 | 5 | . | . | . | . | . | ||||||