
| 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 | 108 | . | . | . | . | . | . | . | . | . | 3 | 11 | 27 | 9 | 24 | 3 | . | . | . | ||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | ||||||||
| Large Skipper | 26 | . | . | . | . | . | . | . | . | 1 | 8 | 9 | . | 3 | 1 | . | . | . | . | ||||||||
| Dingy Skipper | NI | . | . | . | . | 5 | 16 | 17 | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | 89 | . | . | . | 2 | 20 | 22 | 10 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 273 | 3 | . | 5 | . | 38 | 37 | 17 | 2 | . | 1 | . | 2 | 32 | 46 | 10 | 3 | . | . | ||||||||
| Large White | 337 | . | . | . | . | 1 | 2 | 11 | 4 | 14 | . | . | 13 | 119 | 86 | 26 | 4 | 6 | 3 | ||||||||
| Small White | 1149 | . | . | . | . | 1 | 18 | . | 11 | 7 | 4 | 3 | 70 | 173 | 170 | 96 | 249 | 70 | 92 | ||||||||
| Green-veined White | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | . | . | . | . | ||||||||
| Orange Tip | NI | . | . | 1 | . | 1 | 6 | 4 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | NI | . | . | . | . | . | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brown Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 3 | . | ||||||||
| Small Copper | 23 | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 3 | 4 | 4 | 2 | 1 | 2 | ||||||||
| Small Blue | 24 | . | . | . | . | . | 4 | 1 | . | 9 | . | . | . | . | 2 | . | . | . | . | ||||||||
| Brown Argus | 56 | . | . | . | . | . | 9 | 29 | . | 1 | . | . | . | 1 | 5 | 4 | 6 | 6 | 3 | ||||||||
| Common Blue | 308 | . | . | . | . | . | 1 | 21 | 25 | 20 | 1 | 4 | 1 | 5 | 44 | 51 | 46 | 21 | 14 | ||||||||
| Chalk-hill Blue | 56 | . | . | . | . | . | . | . | . | . | . | . | 4 | 25 | 9 | 6 | 2 | . | . | ||||||||
| Holly Blue | 252 | 1 | 4 | 1 | . | 4 | 9 | 7 | . | 1 | . | . | 1 | 3 | 1 | 1 | . | . | . | ||||||||
| Duke of Burgundy Fritillary | NI | . | . | 1 | . | 4 | 9 | 12 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | 33 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 3 | 2 | 2 | . | 9 | 8 | ||||||||
| Painted Lady | 8 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 3 | . | 3 | ||||||||
| Small Tortoiseshell | NI | . | 1 | . | . | . | 1 | . | 1 | . | 1 | 2 | 13 | 10 | 3 | 10 | 37 | 54 | 50 | ||||||||
| Peacock | 46 | 5 | . | 2 | . | . | . | 1 | . | . | . | . | 1 | 16 | 14 | . | . | . | . | ||||||||
| Comma | 58 | 3 | . | 2 | . | . | 1 | . | . | . | . | 4 | 6 | 8 | 2 | . | . | 4 | 9 | ||||||||
| Pearl-bordered Fritillary | NI | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||||
| Speckled Wood | 101 | . | 8 | 15 | 4 | 9 | 5 | 4 | . | . | 4 | 3 | 4 | . | 4 | 2 | 7 | 6 | 1 | ||||||||
| Wall Brown | NI | . | . | . | . | . | 1 | 6 | . | . | . | . | . | 2 | . | 1 | . | . | . | ||||||||
| Marbled White | 23 | . | . | . | . | . | . | . | . | . | 2 | 9 | 5 | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 631 | . | . | . | . | . | . | . | . | . | . | 9 | 114 | 77 | 231 | 19 | 2 | 1 | . | ||||||||
| Meadow Brown | 3972 | . | . | . | . | . | . | . | 3 | 9 | 52 | 103 | 284 | 746 | 847 | 530 | 360 | 146 | 91 | ||||||||
| Small Heath | 351 | . | . | 2 | . | . | 6 | 14 | 10 | 84 | 45 | 81 | 30 | 12 | 3 | 1 | 6 | 3 | 3 | ||||||||
| Ringlet | 123 | . | . | . | . | . | . | . | . | . | 45 | 30 | 21 | 1 | . | . | . | . | . | ||||||||