
| 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/Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | 3 | 8 | 12 | 6 | 4 | . | . | . | . | . | . | |||||
| Large Skipper | 67 | . | . | . | . | . | . | . | 6 | . | 3 | 24 | 11 | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 49 | . | . | 6 | . | 21 | 4 | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 107 | 13 | 2 | 6 | 12 | 16 | 10 | 3 | 1 | . | . | . | . | 3 | 9 | 5 | 2 | . | . | . | . | . | |||||
| Large White | 54 | . | . | . | . | . | . | 3 | . | . | . | . | . | 14 | 14 | 5 | 2 | 3 | 6 | 2 | 3 | . | |||||
| Small White | 137 | . | . | . | 1 | 1 | 1 | 1 | 1 | . | . | 1 | 23 | . | 27 | 13 | . | 9 | 28 | 8 | 7 | 2 | |||||
| Green-veined White | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | 5 | . | . | 1 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 196 | . | 1 | 8 | 1 | 5 | 4 | 3 | 1 | . | . | 12 | 10 | . | 6 | 1 | 6 | 21 | 45 | 20 | 21 | 11 | |||||
| Small Blue | 14 | . | . | . | 2 | . | . | 2 | . | . | . | . | . | 7 | . | . | . | . | . | . | . | . | |||||
| Brown Argus | 69 | . | . | . | 3 | . | . | 5 | . | . | . | . | . | . | 15 | 15 | 19 | . | 1 | 4 | . | 1 | |||||
| Common Blue | 1252 | . | . | . | . | 36 | 72 | 72 | 26 | 4 | 1 | 4 | 317 | 117 | 83 | 129 | 96 | 30 | 7 | 10 | 16 | 3 | |||||
| Chalk-hill Blue | 509 | . | . | . | . | . | . | . | . | . | . | 12 | . | 173 | 133 | 94 | 79 | 8 | 3 | 1 | . | . | |||||
| Adonis Blue | 19 | . | . | . | . | . | . | 2 | . | . | . | . | 3 | . | . | 1 | 4 | 4 | 1 | 1 | . | . | |||||
| Holly Blue | 37 | . | . | 1 | 7 | . | . | 14 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Duke of Burgundy Fritillary | 5 | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 22 | . | . | . | . | 1 | 1 | . | . | . | . | . | 5 | 2 | 3 | . | . | 1 | 4 | 3 | . | . | |||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 76 | 4 | 7 | 3 | 1 | 3 | 1 | . | 7 | . | . | 4 | 2 | 10 | . | 11 | 10 | 1 | . | . | 1 | . | |||||
| Peacock | 26 | 4 | 4 | 1 | . | 2 | . | . | . | . | . | . | . | . | 11 | 3 | . | . | . | . | . | . | |||||
| Comma | 6 | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | 2 | . | |||||
| Dark Green Fritillary | 65 | . | . | . | . | . | . | . | 2 | . | 1 | 23 | 10 | 5 | 7 | . | . | . | . | . | . | . | |||||
| Speckled Wood | 39 | . | 1 | 1 | . | . | 2 | . | 2 | . | . | . | . | . | . | 1 | 17 | 5 | 1 | 2 | 3 | 3 | |||||
| Wall Brown | 19 | . | . | . | . | 1 | 1 | . | . | . | . | . | 1 | . | 3 | . | 6 | . | . | . | 2 | 5 | |||||
| Marbled White | 178 | . | . | . | . | . | . | . | 1 | 1 | 4 | 71 | 40 | 2 | 1 | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 590 | . | . | . | . | . | . | . | . | . | . | . | 153 | 225 | 68 | 63 | . | 4 | 1 | . | . | . | |||||
| Meadow Brown | 1309 | . | . | . | . | . | . | . | 9 | 7 | 11 | 121 | 177 | 161 | 223 | 226 | 170 | 29 | 10 | . | . | 3 | |||||
| Small Heath | 1065 | . | . | 1 | 25 | 46 | 30 | 59 | 105 | 26 | 3 | 46 | 6 | 9 | 34 | 115 | 219 | 83 | 60 | 21 | 4 | 2 | |||||
| Ringlet | 43 | . | . | . | . | . | . | . | . | . | 5 | 20 | 4 | . | . | . | . | . | . | . | . | . | |||||