
| 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 | . | . | . | . | . | . | . | . | . | 7 | 5 | 29 | 3 | 1 | 1 | . | . | . | ||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | 1 | 3 | . | 2 | 2 | . | . | . | . | ||||||||
| Large Skipper | 53 | . | . | . | . | . | 2 | 10 | 12 | 12 | 2 | 9 | . | . | . | . | . | . | . | ||||||||
| Dingy Skipper | NI | . | . | . | 4 | 4 | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Clouded Yellow | 17 | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | 8 | 1 | . | 1 | . | ||||||||
| Brimstone | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Large White | NI | . | . | . | . | . | . | . | . | . | . | 1 | 17 | 14 | 2 | . | . | . | . | ||||||||
| Small White | 116 | . | 1 | 1 | . | 1 | . | . | . | . | . | 1 | 17 | 24 | 15 | 11 | 10 | 10 | . | ||||||||
| Green-veined White | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 1 | 2 | . | ||||||||
| Small Copper | NI | . | . | . | 4 | 2 | . | 1 | 1 | . | . | . | 2 | 3 | 5 | 3 | 1 | 2 | 1 | ||||||||
| Brown Argus | 17 | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 4 | 2 | 5 | . | 2 | . | ||||||||
| Common Blue | 423 | . | . | . | . | 1 | 26 | 43 | 15 | 13 | . | . | 46 | 96 | 63 | 46 | 15 | 13 | 1 | ||||||||
| Chalk-hill Blue | 1068 | . | . | . | . | . | . | . | . | . | . | 2 | 387 | 167 | 81 | 25 | 9 | 5 | . | ||||||||
| Adonis Blue | 38 | . | . | . | . | . | 4 | 4 | 4 | . | . | . | . | . | 6 | 11 | 2 | 3 | . | ||||||||
| Red Admiral | 19 | . | . | . | . | . | 1 | . | . | 3 | . | . | 1 | 2 | . | 1 | . | 4 | 2 | ||||||||
| Painted Lady | 13 | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 3 | 3 | . | 2 | . | ||||||||
| Small Tortoiseshell | 97 | . | 1 | . | 2 | . | . | . | . | 5 | 1 | . | 3 | 8 | 10 | 10 | . | 29 | 7 | ||||||||
| Peacock | 21 | 2 | 3 | 2 | 3 | . | . | . | . | . | . | . | 4 | 2 | 1 | . | . | . | . | ||||||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||||
| Wall Brown | NI | . | . | . | . | 2 | . | . | . | . | . | . | 9 | 5 | 5 | . | . | . | . | ||||||||
| Marbled White | NI | . | . | . | . | . | . | . | . | 7 | 64 | 67 | 7 | . | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | 6 | 9 | 14 | 14 | 2 | . | . | . | . | ||||||||
| Meadow Brown | 1167 | . | . | . | . | . | . | . | 1 | 7 | 30 | 36 | 316 | 194 | 110 | 67 | 36 | 9 | 3 | ||||||||
| Small Heath | 92 | . | . | . | . | 2 | 6 | 1 | 1 | 7 | 7 | 6 | 2 | 13 | 6 | 10 | 1 | 11 | . | ||||||||