
| 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 | Ind | ||||||||||||||||||||||||||
| Small/Essex Skipper | 11 | . | . | . | . | . | . | 1 | 2 | 2 | 1 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Small Skipper | NI | . | . | . | . | . | . | . | . | 2 | 1 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Large Skipper | 19 | . | . | . | . | . | . | 2 | 3 | 4 | 1 | 4 | 3 | . | . | . | . | . | . | . | . | . | . | ||||
| Clouded Yellow | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||
| Brimstone | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||
| Large White | 35 | . | . | . | 2 | . | . | . | . | . | . | 6 | 4 | 2 | 9 | 4 | 2 | . | . | 3 | . | 1 | . | ||||
| Small White | 95 | . | . | 2 | . | . | . | 1 | . | . | 2 | 1 | 20 | 17 | 12 | 11 | 2 | 5 | 8 | 4 | 1 | 7 | . | ||||
| Green-veined White | 9 | . | 1 | . | . | 2 | . | . | . | . | 1 | . | . | . | . | . | . | . | 2 | . | 1 | . | . | ||||
| Orange Tip | 8 | . | . | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brown Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | ||||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||
| Small Copper | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 2 | 3 | 2 | ||||
| Common Blue | 3 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | ||||
| Red Admiral | 35 | . | . | . | . | . | . | 1 | 1 | 1 | 5 | . | 6 | 3 | 4 | 3 | 2 | 1 | 1 | . | 1 | 1 | 1 | ||||
| Painted Lady | 4 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 2 | . | . | . | . | . | . | . | . | ||||
| Small Tortoiseshell | 46 | 2 | 2 | 3 | . | . | . | 2 | 7 | 8 | . | . | . | 1 | 8 | 1 | 2 | . | . | . | . | . | . | ||||
| Peacock | 7 | . | 1 | 1 | 1 | . | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| Comma | 10 | . | 1 | . | 1 | . | . | . | . | 2 | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | 77 | . | . | 2 | . | 3 | 3 | 2 | 2 | . | 1 | . | 6 | 2 | 4 | 14 | 10 | 5 | 7 | 1 | 2 | 7 | 4 | ||||
| Marbled White | 6 | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 1 | . | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 29 | . | . | . | . | . | . | . | . | . | . | 3 | 9 | 3 | 6 | 6 | 1 | 2 | . | . | . | . | . | ||||
| Meadow Brown | 219 | . | . | . | . | . | . | . | 6 | 10 | 60 | 48 | 29 | 18 | 1 | 8 | 7 | 1 | . | . | . | . | . | ||||