
| 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 | . | . | . | . | . | . | . | . | . | 10 | 11 | 8 | 5 | . | . | . | . | . | ||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | . | 4 | 17 | 27 | 3 | 4 | . | . | . | . | . | . | ||||||||
| Brimstone | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Large White | . | . | . | 16 | 6 | 16 | 12 | 4 | 3 | 5 | 12 | 18 | 28 | 20 | 3 | 3 | . | . | ||||||||
| Small White | . | . | . | 2 | 3 | 3 | 5 | 3 | 1 | 17 | 25 | 95 | 34 | 46 | 24 | 10 | 11 | 3 | ||||||||
| Green-veined White | . | . | 3 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Orange Tip | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 3 | . | . | . | . | . | ||||||||
| White-letter Hairstreak | . | . | . | . | . | . | . | . | 62 | 32 | 27 | 8 | . | . | . | . | . | . | ||||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | ||||||||
| Common Blue | . | . | . | . | . | . | 2 | 4 | . | . | . | . | 1 | 6 | 6 | 3 | 11 | 5 | ||||||||
| Red Admiral | . | . | . | . | 1 | 7 | 2 | 1 | 1 | 2 | . | 2 | 1 | . | . | 1 | . | . | ||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 3 | 1 | . | 1 | . | . | . | . | 2 | 6 | 5 | 6 | 1 | . | . | 3 | . | 1 | ||||||||
| Peacock | 6 | 21 | 17 | 2 | 2 | . | . | . | . | . | 7 | 54 | 34 | 26 | 1 | . | . | 1 | ||||||||
| Comma | 1 | 2 | . | . | . | 2 | . | . | 6 | 11 | 11 | 6 | 6 | 4 | . | . | . | . | ||||||||
| Speckled Wood | . | . | 1 | 1 | . | 3 | 6 | 4 | 8 | . | . | . | . | 1 | 4 | 12 | 39 | 27 | ||||||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 23 | 77 | 148 | 79 | 73 | 34 | 15 | 1 | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 17 | 23 | 96 | 70 | 124 | 100 | 43 | 28 | 8 | 1 | . | ||||||||
| Small Heath | . | . | . | . | . | . | 1 | 3 | 1 | . | 1 | . | . | . | . | . | . | . | ||||||||
| Ringlet | . | . | . | . | . | . | . | 11 | 149 | 81 | 49 | 20 | 4 | 1 | . | . | . | . | ||||||||