
| 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 | . | . | . | . | . | . | . | . | . | . | . | 21 | 35 | 52 | 40 | 22 | 4 | 1 | . | . | ||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 8 | 42 | 6 | 10 | 2 | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 7 | 26 | 14 | 24 | 16 | 2 | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | 6 | 16 | 9 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | 1 | 1 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | ||||||
| Brimstone | 4 | . | 1 | 6 | 6 | 4 | 1 | 1 | 1 | . | 1 | . | . | . | . | 2 | 3 | . | 2 | . | ||||||
| Large White | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 4 | 5 | 3 | . | 2 | . | ||||||
| Small White | . | . | . | 3 | 1 | 2 | . | . | . | . | . | . | . | 2 | 2 | 4 | 1 | . | 4 | . | ||||||
| Green-veined White | . | . | . | 2 | 2 | 1 | 2 | . | . | . | . | . | 4 | 2 | 2 | 4 | 2 | 1 | . | . | ||||||
| Green Hairstreak | . | . | 3 | 17 | 7 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Brown Argus | . | . | . | . | 1 | 2 | . | 1 | . | . | . | . | . | . | . | 2 | . | 6 | 3 | 1 | ||||||
| Common Blue | . | . | . | . | 2 | 2 | 4 | 4 | 1 | . | 1 | 1 | . | . | . | 6 | 16 | 11 | 24 | 6 | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 19 | 12 | 6 | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | ||||||
| Small Tortoiseshell | . | 2 | . | 1 | . | . | . | . | . | . | . | . | 3 | 6 | 1 | . | . | . | . | . | ||||||
| Peacock | 2 | 3 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | 1 | . | . | ||||||
| Comma | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 2 | 11 | 1 | 2 | 3 | 1 | 1 | . | . | . | . | ||||||
| Speckled Wood | . | . | 2 | 5 | 1 | 3 | 2 | 2 | 1 | 2 | 3 | . | 1 | . | 3 | 1 | 2 | 9 | 8 | 6 | ||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 12 | 121 | 123 | 145 | . | 33 | 2 | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 5 | 21 | 36 | 44 | 43 | 30 | 7 | 2 | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 5 | 14 | 66 | 73 | 110 | 83 | 120 | 129 | 102 | 92 | 117 | 39 | ||||||
| Small Heath | . | . | . | . | . | . | 3 | 3 | . | 4 | 35 | 19 | 18 | 16 | 11 | 1 | 1 | . | 1 | . | ||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 12 | 76 | 81 | 52 | 6 | 6 | . | . | . | . | . | ||||||