
| 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 | 133 | . | . | . | . | . | . | . | . | . | . | . | 47 | 51 | 11 | 6 | . | . | . | . | . | ||||||
| Small Skipper | NI | . | . | . | . | . | . | . | . | . | 1 | 2 | 6 | 6 | 5 | 1 | . | . | . | . | . | ||||||
| Essex Skipper | 76 | . | . | . | . | . | . | . | . | . | . | . | 20 | 34 | 12 | 6 | 1 | . | . | . | . | ||||||
| Large Skipper | 202 | . | . | . | . | . | . | 5 | 55 | 70 | 46 | 21 | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | NI | . | . | . | 2 | . | 2 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Large White | NI | . | . | . | . | . | . | . | . | . | . | . | 18 | 19 | 3 | . | 1 | . | . | . | . | ||||||
| Small White | 51 | . | . | . | . | . | 1 | 1 | . | . | . | . | 9 | 26 | 3 | 1 | . | 2 | . | 1 | . | ||||||
| Green-veined White | NI | . | . | . | 1 | 1 | 4 | . | . | . | . | . | 10 | 14 | 2 | . | . | 2 | . | . | . | ||||||
| Small Copper | NI | . | . | . | . | . | 4 | 6 | . | 2 | . | . | 6 | 8 | 8 | 10 | 8 | 3 | . | . | . | ||||||
| Small Blue | NI | . | . | . | . | . | 1 | 5 | 1 | . | 3 | . | . | . | . | . | . | . | . | . | . | ||||||
| Brown Argus | 184 | . | . | . | . | . | . | 40 | 33 | 6 | 6 | 3 | 1 | 7 | 8 | 24 | 8 | 8 | . | . | . | ||||||
| Common Blue | 440 | . | . | . | . | . | 3 | 30 | 61 | 40 | 33 | 18 | 1 | 4 | 7 | 42 | 20 | 54 | 36 | 17 | 5 | ||||||
| Chalk-hill Blue | NI | . | . | . | . | . | . | . | . | . | . | . | 15 | 26 | 19 | 24 | 17 | 5 | . | . | . | ||||||
| Adonis Blue | 292 | . | . | . | . | . | . | 3 | 32 | 28 | 18 | 3 | . | . | . | . | . | 52 | 82 | 41 | 8 | ||||||
| Duke of Burgundy Fritillary | NI | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | 56 | . | . | . | . | . | . | 1 | 3 | 2 | 4 | . | . | 2 | . | 1 | 1 | 15 | 12 | 2 | 2 | ||||||
| Painted Lady | 6 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | 1 | . | 1 | . | ||||||
| Small Tortoiseshell | 58 | 4 | . | . | 1 | . | 1 | . | 1 | . | . | 2 | . | 5 | . | . | . | 16 | 8 | 12 | . | ||||||
| Peacock | NI | 2 | . | 2 | 3 | 2 | 4 | 1 | 2 | . | . | . | 9 | 24 | 21 | 3 | . | 1 | . | . | . | ||||||
| Marsh Fritillary | 39 | . | . | . | . | . | 5 | 14 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Speckled Wood | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | ||||||
| Wall Brown | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | 2 | 17 | 86 | 19 | 14 | 2 | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | 1 | 137 | 167 | 86 | 34 | 2 | . | . | . | . | ||||||
| Meadow Brown | NI | . | . | . | . | . | . | . | 21 | 160 | 247 | 392 | 418 | 630 | 383 | 281 | 110 | 54 | 4 | 1 | . | ||||||
| Small Heath | NI | . | . | . | . | . | 5 | 99 | 119 | 64 | 74 | 40 | 1 | . | . | 14 | 16 | 63 | 12 | 1 | . | ||||||
| Ringlet | NI | . | . | . | . | . | . | . | . | 1 | 50 | 113 | 1 | 2 | . | . | . | . | . | . | . | ||||||