
| 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 | . | . | . | . | . | . | . | . | . | . | . | 7 | 8 | 8 | 5 | 1 | 1 | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | . | 9 | 6 | 5 | . | 1 | 1 | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | . | 2 | 1 | 5 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | . | . | 4 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | ||||||
| Brimstone | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | . | 13 | 1 | . | . | . | . | 2 | ||||||
| Small White | . | . | . | . | 1 | . | . | 2 | . | . | . | . | 5 | . | 5 | 3 | 2 | . | . | . | ||||||
| Green Hairstreak | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | ||||||
| Brown Argus | . | . | . | . | . | 17 | 5 | 14 | 3 | . | . | . | 1 | 5 | 19 | 6 | 5 | 6 | 2 | . | ||||||
| Common Blue | . | . | . | . | . | 16 | 23 | 27 | 9 | . | 1 | . | 10 | 10 | 40 | 46 | 29 | 20 | 4 | . | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 5 | 25 | 44 | 50 | 19 | 3 | 4 | . | . | ||||||
| Adonis Blue | . | . | . | . | . | 3 | . | 1 | . | . | . | . | . | . | . | 2 | 4 | 4 | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||||
| Painted Lady | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 4 | 4 | . | 1 | . | 1 | . | ||||||
| Small Tortoiseshell | . | 1 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Peacock | . | . | 1 | 1 | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | 1 | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | . | 4 | 8 | 9 | 6 | . | . | . | . | . | . | ||||||
| Glanville Fritillary | . | . | . | . | . | . | 6 | 9 | 10 | 4 | . | . | . | . | . | . | . | . | . | . | ||||||
| Speckled Wood | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | ||||||
| Wall Brown | . | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | 5 | 5 | 1 | . | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 1 | 32 | 61 | 63 | 20 | 1 | . | . | . | . | . | ||||||
| Grayling | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 2 | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 18 | 43 | 55 | 8 | 2 | 5 | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 12 | 8 | 69 | 74 | 103 | 114 | 92 | 75 | 22 | 20 | 3 | . | ||||||
| Small Heath | . | . | . | . | . | 1 | 1 | 2 | 11 | 11 | 9 | 6 | 2 | . | 10 | 11 | 10 | 17 | 13 | 6 | ||||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | ||||||