
| 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 Skipper | NI | . | . | . | . | . | . | . | . | 9 | 37 | 51 | 44 | . | 20 | 3 | . | . | . | . | . | ||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | 10 | 12 | 12 | . | 3 | . | . | . | . | . | . | ||||||
| Silver-spotted Skipper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Large Skipper | 44 | . | . | . | . | . | 1 | 8 | 10 | 13 | 7 | 4 | . | . | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | 16 | . | . | 2 | 4 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | 15 | . | 1 | 2 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 84 | 3 | 3 | 11 | 11 | 9 | . | 1 | . | . | . | . | . | . | 14 | . | 8 | . | . | 2 | . | ||||||
| Large White | 61 | . | . | . | 1 | 2 | 1 | . | 2 | . | . | 6 | . | 3 | 24 | 1 | 1 | 2 | 1 | . | . | ||||||
| Small White | 119 | . | . | . | . | 8 | 1 | . | . | . | . | 3 | 1 | 2 | 26 | 11 | 5 | 6 | 18 | 9 | 3 | ||||||
| Green-veined White | 84 | . | 1 | 4 | 4 | 4 | . | . | . | . | 1 | . | 13 | 7 | 24 | 1 | . | 5 | 2 | . | . | ||||||
| Orange Tip | 19 | . | . | 2 | 4 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | 12 | . | . | 3 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | 23 | . | . | 1 | 2 | . | 1 | . | . | . | . | 2 | 1 | . | 1 | . | . | 3 | 3 | . | 4 | ||||||
| Brown Argus | 40 | . | . | . | 2 | 3 | 2 | 2 | 2 | 2 | 2 | . | . | . | 3 | . | 2 | 8 | 5 | 2 | . | ||||||
| Common Blue | 123 | . | . | . | . | 8 | 12 | 10 | 4 | 3 | 3 | . | 3 | . | 11 | 18 | 11 | 6 | 7 | 2 | . | ||||||
| Chalk-hill Blue | 41 | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 20 | 2 | 3 | 1 | 1 | . | . | ||||||
| Holly Blue | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 33 | . | . | . | . | . | . | 3 | 1 | 2 | 1 | 1 | . | 2 | 5 | . | 1 | 2 | 6 | 1 | 3 | ||||||
| Painted Lady | 8 | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | . | . | . | 3 | 2 | . | ||||||
| Small Tortoiseshell | 205 | 1 | . | . | . | . | . | 1 | 4 | 1 | 8 | 5 | 7 | 1 | 9 | 19 | 31 | 29 | 31 | 20 | 14 | ||||||
| Peacock | 41 | 3 | 1 | 5 | 2 | . | 1 | . | . | . | . | . | . | . | 11 | . | 3 | . | 2 | 1 | . | ||||||
| Comma | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | 4 | ||||||
| Speckled Wood | 149 | . | 4 | 6 | 4 | 6 | 1 | 15 | 6 | 4 | 7 | 4 | 5 | 3 | 13 | 6 | 14 | 11 | 8 | 6 | 3 | ||||||
| Wall Brown | 48 | . | . | . | . | 4 | . | 1 | . | . | . | . | . | . | 1 | 13 | 10 | 9 | 1 | . | . | ||||||
| Marbled White | 98 | . | . | . | . | . | . | . | . | 4 | 21 | 56 | 11 | 1 | 3 | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 125 | . | . | . | . | . | . | . | . | . | 1 | 3 | 16 | 15 | 37 | 17 | 5 | 3 | 1 | . | . | ||||||
| Meadow Brown | 886 | . | . | . | . | . | . | 7 | 30 | 39 | 81 | 119 | 80 | 60 | 135 | 50 | 69 | 81 | 30 | 12 | . | ||||||
| Small Heath | 337 | . | . | 2 | 4 | 17 | 31 | 28 | 39 | 28 | 34 | 32 | 30 | 3 | 9 | 6 | 9 | 16 | 5 | 6 | 3 | ||||||
| Ringlet | 61 | . | . | . | . | . | . | . | . | 2 | 12 | 28 | 15 | 2 | 1 | . | . | . | . | . | . | ||||||