
| 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 | 25 | 4 | 5 | . | . | . | . | . | . | ||||||
| Essex Skipper | . | . | . | . | . | . | . | . | 1 | . | 5 | . | . | . | . | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | 1 | . | 3 | 5 | 3 | 32 | 14 | 3 | 3 | . | . | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 5 | 1 | . | 2 | 2 | 3 | . | . | . | . | . | 4 | 1 | 3 | 2 | . | . | 3 | . | . | ||||||
| Large White | . | . | . | . | . | 1 | . | 1 | . | . | 5 | 11 | 3 | 14 | 4 | 5 | . | . | . | . | ||||||
| Small White | . | . | . | . | . | . | 1 | . | 3 | . | 3 | 50 | 18 | 19 | 25 | 25 | 8 | 2 | . | . | ||||||
| Green-veined White | . | . | . | . | . | 1 | . | . | . | . | . | 8 | 1 | 5 | 6 | 2 | . | 1 | . | . | ||||||
| Orange Tip | 1 | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | . | . | . | 6 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | 1 | . | . | 2 | 6 | 9 | 2 | 2 | 5 | 18 | 13 | 13 | 5 | ||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 20 | 17 | 22 | 4 | . | 1 | . | ||||||
| Common Blue | . | . | . | . | . | 6 | 9 | 13 | 18 | 3 | 5 | . | 25 | 77 | 94 | 88 | 32 | 11 | 1 | 2 | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 14 | 38 | 119 | 98 | 49 | 28 | 3 | . | 1 | ||||||
| Holly Blue | . | . | . | 1 | 2 | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Small Tortoiseshell | 3 | . | . | . | . | 1 | . | . | . | . | 4 | 9 | . | 10 | 6 | 17 | . | . | . | . | ||||||
| Peacock | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 7 | . | 2 | . | 2 | . | . | ||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Speckled Wood | . | . | 1 | 2 | . | . | . | 1 | 1 | . | . | 2 | 2 | 2 | 2 | 3 | . | 2 | 1 | . | ||||||
| Wall Brown | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | 7 | 1 | 6 | . | . | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | . | 1 | 21 | 193 | 117 | 16 | 6 | 3 | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 42 | 25 | 47 | 15 | 2 | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 17 | 20 | 143 | 181 | 92 | 180 | 80 | 40 | 9 | 3 | . | . | ||||||
| Small Heath | . | 1 | . | . | . | 1 | 2 | 9 | 7 | . | 10 | 4 | 5 | . | 5 | 14 | 10 | 8 | 5 | 2 | ||||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 37 | 6 | . | . | . | . | . | . | . | . | ||||||