
| 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 | 33 | . | . | . | . | . | . | . | . | . | 1 | 13 | 12 | . | . | . | . | . | . | . | . | ||||||
| Essex Skipper | 3 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | . | ||||||
| Large Skipper | 16 | . | . | . | . | . | . | . | 1 | 1 | 1 | 7 | 2 | . | . | . | . | . | . | . | . | ||||||
| Grizzled Skipper | 38 | . | . | . | . | 5 | 15 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | ||||||
| Brimstone | 44 | 3 | 7 | . | 1 | . | 3 | 4 | . | . | . | . | 3 | 3 | 5 | 3 | 1 | . | . | . | . | ||||||
| Large White | 70 | . | . | . | . | . | 1 | 1 | . | . | . | . | 10 | 13 | 4 | 5 | 2 | 6 | 9 | 1 | . | ||||||
| Small White | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | ||||||
| Green-veined White | 28 | . | . | 1 | . | . | . | 1 | 1 | . | . | . | 1 | 3 | 2 | 2 | 1 | 3 | 1 | 2 | 1 | ||||||
| Orange Tip | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | 9 | . | . | . | . | . | 1 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | 40 | . | . | . | . | . | 1 | 1 | . | . | 1 | 2 | 1 | 1 | 8 | 4 | . | . | 3 | 5 | 6 | ||||||
| Silver-studded Blue | 201 | . | . | . | . | . | . | 4 | 5 | 18 | 12 | 9 | 15 | 5 | 24 | 35 | 19 | 10 | 11 | 1 | 1 | ||||||
| Brown Argus | 103 | . | . | . | . | . | . | 6 | 1 | 2 | . | . | 3 | 6 | 11 | 14 | 11 | 21 | 7 | 2 | 2 | ||||||
| Common Blue | 260 | . | . | . | . | . | . | 48 | 6 | 9 | 6 | . | 2 | 3 | 24 | 34 | 31 | 16 | 19 | . | . | ||||||
| Holly Blue | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 21 | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | 1 | . | 1 | 5 | 9 | ||||||
| Painted Lady | 2 | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||||
| Small Tortoiseshell | 7 | 1 | . | . | 1 | 1 | . | . | . | . | . | 1 | . | . | . | 1 | . | 1 | 1 | . | . | ||||||
| Peacock | 24 | 6 | 2 | 1 | . | . | 1 | 1 | . | . | 1 | . | . | 3 | 3 | 1 | 1 | . | 1 | . | . | ||||||
| Comma | 7 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | . | . | . | 3 | ||||||
| Speckled Wood | 6 | . | . | 2 | 1 | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | 1 | ||||||
| Marbled White | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||||
| Grayling | 1165 | . | . | . | . | . | . | . | . | . | . | 30 | 193 | 121 | 229 | 172 | 113 | 66 | 46 | . | . | ||||||
| Gatekeeper / Hedge Brown | 825 | . | . | . | . | . | . | . | . | . | . | 7 | 191 | 166 | 130 | 83 | 36 | 21 | 7 | . | . | ||||||
| Meadow Brown | 592 | . | . | . | . | . | . | . | 1 | 5 | 18 | 74 | 117 | 63 | 70 | 46 | 31 | 15 | 11 | . | . | ||||||
| Small Heath | 366 | . | . | . | . | . | 1 | 9 | 1 | 24 | 56 | 95 | 55 | 5 | 4 | 1 | . | 8 | 10 | 6 | 5 | ||||||
| Ringlet | 6 | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | ||||||