
| 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 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 20 | 22 | 44 | 30 | 8 | . | . | . | . | . | . | . |
| Large Skipper | . | . | . | . | . | . | . | . | . | 2 | 6 | 10 | . | . | 4 | 2 | 6 | . | 2 | . | . | . | . | . | . | . |
| Dingy Skipper | . | . | . | . | . | 8 | 12 | 16 | 18 | 14 | 8 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Grizzled Skipper | . | . | . | . | . | . | 4 | 6 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Wood White | . | . | . | . | . | . | . | 4 | 10 | 8 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Brimstone | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 2 | . | 2 | . | . | . | . | . |
| Large White | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | 2 | 2 | 2 | . | 2 | . | . | . | . | 2 | . | . |
| Small White | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | 2 | . | . | . | . | 10 | . | . | 2 | 2 | . |
| Green-veined White | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | 4 | 6 | . | 6 | 6 | . | 2 | 2 | . | . |
| Orange Tip | . | . | 2 | 2 | 2 | 2 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Green Hairstreak | . | . | . | . | . | . | 6 | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . |
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | 8 | . | . | 4 |
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 2 | 12 | 2 | . | . | . | . | . |
| Common Blue | . | . | . | . | . | . | 10 | 32 | 44 | 32 | . | 16 | 14 | 2 | 2 | 2 | . | 8 | 48 | 36 | 32 | . | 4 | 4 | 2 | 2 |
| Holly Blue | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . |
| Duke of Burgundy Fritillary | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Red Admiral | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 2 | . | . | 2 | . | . |
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . |
| Small Tortoiseshell | 2 | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | 2 | . | . | . | 2 | . | . | . | 2 | 2 | . | 2 |
| Peacock | 2 | . | . | . | 10 | . | . | . | 2 | . | . | . | . | . | . | 2 | 4 | 16 | 4 | . | . | . | . | 2 | . | . |
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | 12 | . | 10 | 24 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Pearl-bordered Fritillary | . | . | . | . | . | . | . | . | . | 6 | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . |
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . |
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . |
| Marsh Fritillary | . | . | . | . | . | . | 22 | 22 | 20 | 14 | 12 | 12 | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Speckled Wood | 2 | . | . | 2 | 2 | 2 | 4 | 8 | 4 | 2 | . | 2 | . | . | 2 | . | . | 4 | 24 | 24 | 10 | . | . | 4 | 4 | . |
| Wall Brown | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | 6 | . | . | 4 | . | . | . |
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | . | . | 8 | 80 | 96 | 62 | 8 | 8 | . | . | . | . | . | . | . |
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 34 | 104 | 190 | 134 | 70 | 26 | . | . | . | . | . |
| Meadow Brown | . | . | . | . | . | . | . | . | . | . | . | 4 | 82 | 162 | 108 | 76 | 76 | 10 | 10 | 6 | 2 | . | . | . | . | . |
| Small Heath | . | . | . | . | . | . | 2 | 12 | 18 | 22 | . | 22 | 16 | 12 | 8 | 6 | 4 | . | . | . | . | . | 4 | . | . | . |
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | . | . | 22 | 68 | 52 | 94 | 16 | 2 | . | . | . | . | . | . | . |