
| 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 | . | . | . | . | . | . | . | . | . | . | . | 3 | 25 | 26 | 31 | 12 | . | . | . | . | ||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 2 | . | . | . | . | . | ||||||
| Large Skipper | NI | . | . | . | . | . | . | . | . | . | 1 | . | 9 | 4 | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | 69 | . | . | . | . | . | 1 | 21 | 31 | 10 | 5 | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Grizzled Skipper | 32 | . | . | . | . | . | 7 | 7 | 13 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 1 | 1 | . | . | . | ||||||
| Brimstone | 273 | 11 | 21 | 6 | 2 | 6 | 37 | 65 | 30 | 30 | 14 | 17 | 14 | 2 | 1 | 2 | 9 | 3 | . | 3 | . | ||||||
| Large White | 301 | . | . | 1 | . | . | 1 | . | 5 | 6 | 4 | 5 | 1 | 3 | 80 | 68 | 39 | 15 | . | 1 | . | ||||||
| Small White | 2454 | . | . | . | . | . | 5 | 2 | 12 | 11 | 6 | 11 | 7 | 17 | 704 | 500 | 272 | 161 | 10 | 15 | 6 | ||||||
| Green-veined White | 17 | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | 4 | 1 | 3 | . | 1 | . | ||||||
| Orange Tip | 27 | . | 1 | 2 | . | 1 | 2 | 17 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | 40 | . | . | . | . | 4 | 9 | 8 | 9 | 6 | 2 | 2 | . | . | . | . | . | . | . | . | . | ||||||
| Brown Hairstreak | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | ||||||
| Small Copper | 11 | . | . | . | . | . | 3 | 2 | 1 | . | . | . | . | . | 1 | 5 | . | . | . | . | . | ||||||
| Small Blue | 18 | . | . | . | . | . | . | . | 1 | 6 | 4 | 4 | 5 | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | 36 | . | . | . | . | . | . | . | 7 | 8 | 4 | 6 | 1 | . | 2 | 6 | 3 | . | . | . | . | ||||||
| Common Blue | 503 | . | . | . | . | . | . | . | 38 | 101 | 70 | 46 | 36 | 5 | 18 | 42 | 49 | 35 | 10 | . | . | ||||||
| Chalk-hill Blue | 68 | . | . | . | . | . | . | . | . | . | . | . | . | . | 15 | 17 | 16 | 2 | 2 | . | . | ||||||
| Holly Blue | 155 | . | . | . | . | 1 | 1 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Duke of Burgundy Fritillary | 33 | . | . | . | . | . | 3 | 6 | 11 | 11 | 2 | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 37 | . | . | . | . | . | . | . | . | . | . | . | . | . | 8 | 1 | 3 | 1 | 6 | 1 | 3 | ||||||
| Painted Lady | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Small Tortoiseshell | NI | 14 | 23 | 9 | 2 | 6 | 2 | . | . | . | . | . | . | 12 | 21 | 22 | 1 | 2 | 1 | . | . | ||||||
| Peacock | 71 | 5 | 6 | 10 | . | 5 | 9 | 2 | 1 | 1 | 1 | . | . | . | 7 | 3 | 1 | 5 | . | . | 4 | ||||||
| Comma | 17 | 1 | . | 2 | . | . | . | . | . | . | . | . | . | 4 | 2 | . | 1 | . | . | . | 3 | ||||||
| Pearl-bordered Fritillary | NI | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Speckled Wood | 178 | . | 2 | 4 | 12 | 6 | 13 | 12 | 7 | 13 | 9 | 14 | 18 | 13 | 2 | 5 | 5 | 8 | 5 | 6 | . | ||||||
| Wall Brown | NI | . | . | . | . | . | 1 | . | . | 2 | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | . | . | . | . | 11 | . | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 1447 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 292 | 268 | 190 | 208 | . | . | . | ||||||
| Meadow Brown | 3394 | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 93 | 447 | 414 | 722 | 596 | 24 | 18 | . | ||||||
| Small Heath | 236 | . | . | . | . | . | . | 2 | 44 | 23 | 20 | 16 | 26 | 17 | 11 | 25 | 15 | 10 | . | . | . | ||||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | . | . | . | 31 | . | . | . | . | . | . | . | ||||||