
| 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 | 33 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 6 | 6 | 6 | 5 | 8 | . | . | . | . | . | . | |
| Large Skipper | 26 | . | . | . | . | . | . | . | . | . | . | . | 3 | 5 | 1 | 2 | 2 | 5 | 2 | . | . | . | . | . | . | . | |
| Clouded Yellow | 8 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 2 | 3 | . | 1 | |
| Brimstone | 31 | 2 | . | . | 2 | 8 | 2 | 4 | 1 | . | . | 1 | . | . | . | . | . | . | 2 | 1 | 2 | 1 | 1 | . | . | . | |
| Large White | 24 | . | . | . | . | . | . | 1 | 1 | . | . | 1 | . | 1 | 2 | 2 | 5 | 3 | 2 | 4 | 1 | . | . | 1 | . | . | |
| Small White | 30 | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | 1 | . | 2 | 7 | 12 | 1 | . | 1 | 1 | 1 | 1 | |
| Green-veined White | 97 | . | . | . | 3 | 8 | 5 | 11 | 5 | 2 | . | 6 | . | 4 | 1 | 5 | 6 | 16 | 5 | 8 | 4 | 3 | 3 | 1 | . | . | |
| Orange Tip | 28 | . | . | . | 1 | 8 | 11 | 6 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |
| Green Hairstreak | 3 | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |
| Small Copper | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | . | . | . | |
| Common Blue | 2 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |
| White Admiral | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | |
| Red Admiral | 6 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | 1 | 2 | 1 | |
| Painted Lady | 7 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 4 | . | 2 | . | . | |
| Small Tortoiseshell | 8 | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | . | . | . | . | 1 | . | 1 | . | 1 | |
| Peacock | 62 | 3 | . | . | 10 | 11 | 5 | 4 | . | . | . | . | . | . | . | . | . | 6 | 6 | 2 | . | 2 | 1 | . | . | . | |
| Comma | 42 | 2 | . | . | 1 | . | . | . | . | . | . | . | . | 3 | 1 | 2 | 2 | 3 | 1 | . | 1 | 1 | 3 | 5 | 7 | 6 | |
| Small Pearl-bordered Fritillary | 18 | . | . | . | . | . | . | . | . | . | 6 | 6 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |
| Pearl-bordered Fritillary | 35 | . | . | . | . | 1 | 1 | 8 | 13 | 4 | 2 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |
| Silver-washed Fritillary | 102 | . | . | . | . | . | . | . | . | . | . | . | . | 9 | 5 | 8 | 10 | 21 | 24 | 19 | 2 | 3 | . | . | . | . | |
| Speckled Wood | 104 | . | . | . | 1 | 1 | 4 | 3 | 6 | 5 | 4 | 2 | 5 | 3 | 1 | . | 1 | 5 | 11 | 9 | 10 | 6 | 5 | 5 | 6 | 6 | |
| Gatekeeper / Hedge Brown | 171 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 7 | 35 | 53 | 38 | 22 | 9 | . | . | . | . | |
| Meadow Brown | 333 | . | . | . | . | . | . | . | . | . | . | . | 2 | 25 | 24 | 60 | 48 | 55 | 31 | 40 | 22 | 10 | 6 | 3 | . | . | |
| Ringlet | 365 | . | . | . | . | . | . | . | . | . | . | . | . | 93 | 88 | 103 | 60 | 14 | 2 | 2 | . | . | . | . | . | . | |