
| 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/Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | 11 | 32 | 49 | 38 | 8 | 5 | . | . | . | . | . | ||||
| Small Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | 2 | . | . | . | . | . | . | . | ||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 5 | 2 | . | . | . | . | . | . | . | ||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 1 | 1 | 9 | 13 | 12 | 5 | 2 | . | 3 | . | . | . | . | ||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||
| Brimstone | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Large White | . | . | . | . | 4 | 4 | 7 | 11 | 5 | 5 | . | 2 | 3 | 19 | 15 | 3 | 4 | . | . | . | . | . | ||||
| Small White | . | . | . | . | . | 2 | 2 | 3 | 1 | . | . | . | 3 | 14 | 5 | 11 | 7 | . | . | 2 | 3 | . | ||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | ||||
| Orange Tip | . | . | . | 1 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | 8 | 6 | 12 | 4 | 2 | . | . | . | . | ||||
| White-letter Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 31 | 19 | 10 | 3 | . | . | . | . | . | . | . | ||||
| Small Copper | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Common Blue | . | . | . | . | . | . | . | . | . | 3 | . | 1 | . | . | . | . | 9 | 9 | 15 | 2 | . | . | ||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | ||||
| Red Admiral | . | . | . | . | . | . | . | 1 | 1 | 4 | 3 | 6 | 2 | 3 | . | 1 | 1 | 1 | 3 | 2 | 3 | . | ||||
| Small Tortoiseshell | . | 4 | 1 | . | . | . | . | 1 | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | . | ||||
| Peacock | 2 | 4 | 11 | 5 | . | . | . | . | . | . | . | . | . | 16 | 8 | 8 | 4 | . | . | . | . | . | ||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 11 | 4 | 2 | 5 | . | 2 | 6 | 9 | 16 | ||||
| Speckled Wood | . | . | . | . | . | . | . | 7 | 1 | 8 | 7 | 13 | 6 | 5 | 4 | 6 | 16 | 42 | 67 | 50 | 8 | 4 | ||||
| Wall Brown | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | 3 | 5 | 8 | 5 | 1 | . | . | . | ||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | . | 18 | 250 | 202 | 147 | 60 | 11 | . | . | . | . | ||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 1 | 1 | 27 | 76 | 77 | 39 | 46 | 33 | 11 | 5 | . | . | . | ||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 1 | 37 | 48 | 29 | 26 | 4 | . | . | . | . | . | . | ||||
| Unknown White | . | . | . | . | 2 | . | 3 | 2 | . | . | . | 1 | 3 | 2 | 3 | . | . | 14 | 7 | 9 | . | . | ||||