
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 31 | 52 | 48 | 9 | 10 | . | . | . | . | . | . | |
| Large Skipper | . | . | . | . | . | . | . | . | . | 1 | 2 | 11 | 13 | 19 | 20 | 4 | 1 | . | . | . | . | . | . | . | . | |
| Grizzled Skipper | . | . | . | . | . | 2 | 5 | 1 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |
| Brimstone | . | 7 | . | 2 | 5 | . | . | . | . | . | . | . | . | . | . | 5 | 8 | 2 | . | . | 5 | . | . | . | . | |
| Large White | . | . | . | . | . | . | 3 | 2 | . | 2 | 2 | . | . | . | 4 | 7 | 8 | 2 | 6 | 1 | 2 | . | 1 | . | . | |
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 17 | 13 | 14 | 20 | 22 | 34 | 13 | 11 | 2 | 1 | |
| Green-veined White | . | . | . | 3 | 2 | 3 | 2 | 3 | . | 1 | 1 | . | . | 1 | 11 | 23 | 17 | 11 | 6 | 7 | 10 | 7 | 7 | 3 | . | |
| Orange Tip | . | . | . | 5 | 6 | 3 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |
| Brown Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | . | . | . | . | . | . | . | |
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 5 | . | . | . | . | . | . | . | |
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 13 | 21 | 17 | 15 | 6 | 4 | 2 | . | |
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | . | . | 4 | . | 2 | . | . | |
| Common Blue | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 1 | 1 | 8 | 28 | 41 | 26 | 4 | 5 | . | . | |
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |
| Duke of Burgundy Fritillary | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |
| White Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 3 | 1 | . | . | . | . | . | . | . | . | |
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 19 | 26 | 3 | 2 | |
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | 1 | . | . | |
| Small Tortoiseshell | 2 | . | . | . | 3 | . | . | . | . | . | . | . | 5 | 2 | 4 | 2 | 3 | 1 | 13 | 37 | 12 | 10 | 5 | . | . | |
| Peacock | 16 | 11 | 1 | 11 | 5 | 2 | . | 1 | . | . | . | . | . | . | 3 | 46 | 123 | 13 | 4 | 5 | 10 | 4 | . | 3 | . | |
| Comma | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 10 | 15 | 11 | 5 | 1 | |
| Pearl-bordered Fritillary | . | . | . | . | . | 2 | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 3 | 5 | . | . | . | . | . | . | . | . | |
| Marsh Fritillary | . | . | . | . | . | . | 4 | 23 | 11 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |
| Speckled Wood | . | . | . | . | . | 1 | . | . | 1 | 5 | 6 | 9 | . | 7 | 9 | 4 | . | 2 | 5 | 37 | 16 | 45 | 13 | 11 | . | |
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | . | . | 16 | 25 | 12 | 2 | . | 1 | . | . | . | . | . | . | |
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 13 | 40 | 74 | 32 | 81 | 53 | 6 | . | . | . | . | |
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | . | 13 | 82 | 289 | 193 | 79 | 40 | 56 | 27 | 5 | 5 | 1 | . | . | . | |
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 50 | 141 | 125 | 47 | 5 | 2 | . | . | . | . | . | . | |