
| 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 | . | . | . | . | . | . | . | . | 23 | 25 | 64 | 13 | 1 | 9 | . | . | . | |||||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | 2 | 24 | 6 | 5 | . | . | . | |||||||||
| Large Skipper | . | . | . | . | . | 2 | 6 | 7 | 2 | 15 | . | . | . | . | . | . | . | |||||||||
| Dingy Skipper | . | . | . | 3 | 3 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||||
| Brimstone | 1 | 7 | 1 | 6 | 2 | . | . | . | 3 | 1 | . | 3 | 3 | 1 | . | . | . | |||||||||
| Large White | . | . | . | . | . | . | . | . | . | 1 | 4 | 8 | . | . | . | . | . | |||||||||
| Small White | . | . | . | 2 | 1 | . | . | . | 1 | 10 | 4 | 22 | 22 | 17 | 17 | 11 | 3 | |||||||||
| Green-veined White | . | . | . | . | 1 | . | . | . | . | . | 1 | . | 3 | . | . | . | . | |||||||||
| Orange Tip | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | . | 3 | 1 | 7 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 5 | 1 | 5 | 1 | . | |||||||||
| Common Blue | . | . | . | . | 15 | 13 | 7 | 13 | . | . | 1 | 27 | 48 | 11 | 41 | 14 | 1 | |||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | 3 | 26 | 7 | 10 | 9 | 1 | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| Painted Lady | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 2 | 2 | . | |||||||||
| Peacock | . | 1 | . | 1 | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | |||||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | . | . | . | . | . | 1 | 1 | 5 | . | . | . | . | . | . | 1 | 6 | 4 | |||||||||
| Marbled White | . | . | . | . | . | . | . | 4 | 38 | 55 | 24 | . | . | . | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 1 | 3 | . | 3 | . | . | . | . | . | |||||||||
| Meadow Brown | . | . | . | . | . | 1 | 5 | 14 | 36 | 50 | 127 | 68 | 98 | 82 | 36 | 58 | 1 | |||||||||
| Small Heath | . | . | . | 3 | 8 | 23 | 16 | 41 | 47 | 23 | 21 | 6 | 12 | 16 | 13 | 23 | . | |||||||||
| Ringlet | . | . | . | . | . | . | . | 6 | 11 | 1 | 3 | 6 | . | . | . | . | . | |||||||||