
| 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 | ||||||||||||||||||||||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . |
| Brimstone | 1 | . | . | . | 4 | 2 | 5 | 7 | . | 7 | 5 | 3 | 3 | . | . | . | 1 | . | . | . | . | . | 1 | . | . | . |
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . |
| Small White | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Orange Tip | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Green Hairstreak | . | . | . | . | . | . | . | . | 2 | 6 | 6 | 10 | 3 | 7 | 9 | . | . | . | . | . | . | . | . | . | . | . |
| Small Copper | . | . | . | . | . | 2 | 2 | . | 2 | . | . | 1 | . | 1 | . | . | . | 1 | 1 | . | . | 2 | 2 | . | 2 | . |
| Holly Blue | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 3 | 3 | . |
| Peacock | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| Small Pearl-bordered Fritillary | . | . | . | . | . | . | 13 | 25 | 31 | 12 | 6 | 3 | 4 | . | . | . | . | . | 3 | 4 | . | . | . | . | . | . |
| Pearl-bordered Fritillary | . | . | . | 1 | 6 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . |
| High Brown Fritillary | . | . | . | . | . | . | . | . | . | . | . | 5 | 7 | 16 | 7 | 3 | 4 | 1 | 2 | . | . | . | . | . | . | . |
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 1 | 9 | 12 | 20 | 20 | 14 | 14 | 11 | 1 | 2 | . | . | . | . | . | . | . |
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 3 | 3 | 10 | 3 | . | 1 | . | . | . | . | . |
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | 1 | 2 | 1 | 1 | 3 | 1 |
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | 17 | 44 | 88 | 102 | 101 | 107 | 43 | 65 | 18 | 6 | . | . | . |
| Meadow Brown | . | . | . | . | . | . | . | . | . | 1 | 2 | 19 | 46 | 68 | 72 | 5 | 13 | 10 | 27 | 4 | 4 | 2 | . | . | . | . |
| Small Heath | . | . | . | . | 1 | 3 | 5 | 2 | . | . | 1 | . | 1 | . | . | . | . | . | . | 2 | 1 | 1 | 3 | . | . | . |
| Ringlet | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 9 | 8 | 7 | 2 | . | . | . | . | . | . | . | . | . |