
| 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 | . | . | . | . | . | . | . | 4 | . | . | 12 | 21 | 39 | 17 | 23 | . | . | . | . | |||||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 2 | . | . | . | . | |||||||
| Large Skipper | . | . | . | . | . | . | . | 2 | . | 7 | 4 | 4 | 20 | . | . | . | . | . | . | |||||||
| Dingy Skipper | . | 2 | 5 | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||
| Brimstone | 1 | 6 | 5 | 5 | 2 | . | . | 3 | . | . | . | . | . | . | 4 | . | 1 | 1 | 1 | |||||||
| Large White | . | . | 1 | . | 4 | . | . | 1 | . | . | 3 | 6 | 19 | . | 5 | . | 3 | . | . | |||||||
| Small White | . | 4 | 3 | . | 1 | . | 1 | 3 | . | . | 11 | 10 | 1 | 17 | 3 | . | 1 | . | . | |||||||
| Green-veined White | . | . | . | 2 | 1 | . | 2 | 1 | . | . | 3 | 3 | 14 | 4 | 10 | . | . | . | . | |||||||
| Orange Tip | . | 6 | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | . | . | 1 | . | 1 | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | . | . | . | . | . | 1 | . | . | . | . | 4 | . | 3 | . | 2 | . | 2 | . | . | |||||||
| Brown Argus | . | . | . | . | 2 | 1 | . | 3 | . | . | . | . | . | . | 5 | . | 1 | . | . | |||||||
| Common Blue | . | . | 3 | . | 9 | 4 | 1 | 6 | . | . | . | . | . | . | 8 | 1 | 12 | 1 | 3 | |||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | 1 | 19 | 33 | 33 | 27 | . | . | . | . | |||||||
| Holly Blue | . | 2 | . | 3 | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | 1 | |||||||
| Painted Lady | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Tortoiseshell | . | 1 | 1 | . | 1 | . | 1 | 5 | 2 | 1 | 3 | . | 1 | 1 | 1 | . | 4 | 1 | . | |||||||
| Peacock | 1 | 3 | . | 5 | 1 | 1 | . | . | . | . | . | . | 2 | 4 | 1 | . | . | . | . | |||||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | |||||||
| Speckled Wood | . | . | . | . | . | 2 | 3 | 4 | . | 3 | . | 1 | . | 2 | 3 | 12 | 18 | 13 | 11 | |||||||
| Marbled White | . | . | . | . | . | . | . | . | 16 | 25 | 38 | 35 | 18 | . | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 1 | 7 | 19 | 28 | 18 | 24 | . | . | 4 | . | |||||||
| Meadow Brown | . | . | . | . | . | . | 4 | 5 | 7 | 3 | 17 | 12 | 46 | 30 | 31 | 10 | 42 | 4 | 6 | |||||||
| Small Heath | . | . | 4 | . | 2 | 3 | 5 | 8 | 1 | 6 | 20 | 13 | 6 | 1 | . | . | 2 | 1 | . | |||||||
| Ringlet | . | . | . | . | . | . | . | . | 8 | 11 | 4 | 3 | 6 | . | . | . | . | . | . | |||||||