
| 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 | 51 | . | . | . | . | . | . | . | . | 1 | 1 | 2 | 24 | 2 | 9 | 5 | . | . | . | . | . | ||||||
| Essex Skipper | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||
| Large Skipper | 23 | . | . | . | . | . | . | 1 | 2 | 4 | 7 | 8 | 1 | . | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | 34 | . | . | . | 1 | 10 | 7 | 10 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | 8 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 1 | . | 3 | . | ||||||
| Brimstone | 4 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | ||||||
| Large White | 12 | . | . | . | . | . | . | . | . | . | . | 4 | 2 | 2 | . | 1 | 2 | . | . | 1 | . | ||||||
| Small White | 87 | . | 1 | . | 1 | . | 1 | . | . | . | . | 3 | 25 | 5 | 14 | 16 | 4 | 6 | 1 | 2 | 1 | ||||||
| Green-veined White | 8 | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 1 | 1 | . | 1 | . | 1 | 1 | . | ||||||
| Small Copper | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | . | . | . | ||||||
| Small Blue | 11 | . | . | . | . | 2 | 2 | 4 | . | 2 | . | . | . | . | 1 | . | . | . | . | . | . | ||||||
| Brown Argus | 58 | . | . | . | 2 | 1 | 7 | 1 | . | . | 4 | . | . | . | 8 | 10 | 13 | 10 | . | . | 1 | ||||||
| Common Blue | 150 | . | . | . | . | . | 6 | 2 | 2 | 1 | 3 | 1 | 1 | 2 | 6 | 28 | 53 | 26 | 4 | 13 | 2 | ||||||
| Chalk-hill Blue | 140 | . | . | . | . | . | . | . | . | . | . | 4 | 53 | 16 | 24 | 19 | 10 | 9 | 1 | 4 | . | ||||||
| Adonis Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Red Admiral | 2 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Painted Lady | 7 | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | 2 | 1 | 1 | . | . | . | ||||||
| Small Tortoiseshell | 36 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | 2 | 1 | 13 | 17 | ||||||
| Peacock | NI | . | 5 | 5 | 2 | 3 | 3 | 1 | . | . | . | . | 4 | 1 | 8 | 1 | 1 | . | 1 | . | . | ||||||
| Marsh Fritillary | 9 | . | . | . | 1 | 2 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Speckled Wood | 16 | . | . | . | 1 | 1 | . | 1 | . | . | . | . | . | . | 1 | 4 | 3 | 2 | . | . | 2 | ||||||
| Wall Brown | 29 | . | . | . | 1 | 3 | . | . | . | . | . | . | . | . | 2 | 5 | 10 | 7 | . | . | . | ||||||
| Marbled White | 99 | . | . | . | . | . | . | . | . | 12 | 40 | 39 | 8 | . | . | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 41 | . | . | . | . | . | . | . | . | . | . | 4 | 9 | 5 | 16 | 2 | . | 5 | . | . | . | ||||||
| Meadow Brown | 254 | . | . | . | . | . | . | . | 1 | 10 | 16 | 27 | 48 | 20 | 47 | 27 | 22 | 29 | 4 | 3 | . | ||||||
| Small Heath | 55 | . | . | . | . | 3 | 5 | 3 | 2 | 2 | 8 | 6 | 2 | . | . | 2 | 7 | 4 | 2 | 7 | 2 | ||||||
| Ringlet | 53 | . | . | . | . | . | . | . | . | 16 | 11 | 15 | 11 | . | . | . | . | . | . | . | . | ||||||