
| 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 | NI | . | . | . | . | . | . | 2 | 8 | 18 | 21 | 4 | 7 | . | . | . | . | . | . | . | |||||||
| Large Skipper | NI | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | 2 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | 12 | . | . | . | 4 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | 7 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | 2 | . | 1 | . | . | . | |||||||
| Brimstone | 91 | 3 | . | 28 | 2 | . | 6 | 6 | . | . | 7 | . | 2 | 19 | 3 | 1 | 1 | . | . | . | |||||||
| Large White | 20 | . | . | . | . | . | . | . | . | . | 1 | 2 | 3 | 7 | 1 | . | . | 2 | 1 | 3 | |||||||
| Small White | NI | . | . | . | . | . | 1 | . | . | 1 | 4 | 6 | 9 | 9 | 2 | 6 | 5 | 2 | . | . | |||||||
| Small Copper | NI | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||
| Small Blue | NI | . | . | . | 1 | 6 | 15 | 6 | . | 3 | 3 | 2 | . | . | . | 1 | . | . | . | . | |||||||
| Brown Argus | 10 | . | . | . | . | . | . | . | . | . | . | . | 1 | 6 | 2 | . | . | . | . | . | |||||||
| Common Blue | NI | . | . | . | . | . | 27 | 15 | 1 | . | . | 2 | 4 | 37 | 39 | 31 | 8 | 19 | . | 1 | |||||||
| Chalk-hill Blue | 135 | . | . | . | . | . | . | . | . | . | 6 | . | 20 | 24 | 37 | 10 | 10 | . | . | . | |||||||
| Adonis Blue | NI | . | . | . | . | 2 | 14 | 7 | . | . | . | . | . | 3 | 10 | 25 | 31 | 16 | 13 | 5 | |||||||
| Holly Blue | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | |||||||
| Red Admiral | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Painted Lady | NI | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | 1 | 1 | . | . | . | |||||||
| Small Tortoiseshell | 8 | . | . | . | . | . | . | . | . | . | 2 | . | . | . | 1 | 3 | . | . | . | . | |||||||
| Peacock | 17 | 3 | . | 4 | . | . | . | . | . | . | 1 | 2 | 4 | 1 | 1 | . | . | . | . | . | |||||||
| Dark Green Fritillary | 190 | . | . | . | . | . | . | 9 | 52 | 47 | 25 | 11 | 3 | 5 | 5 | . | . | . | . | . | |||||||
| Marsh Fritillary | NI | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Marbled White | 81 | . | . | . | . | . | . | 1 | 27 | 28 | 12 | 3 | . | . | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 23 | . | . | . | . | . | . | . | . | 1 | 4 | 6 | 1 | 5 | 4 | . | . | . | . | . | |||||||
| Meadow Brown | 1230 | . | . | . | . | . | . | 20 | 25 | 63 | 160 | 96 | 106 | 190 | 200 | 60 | 46 | 52 | 30 | 27 | |||||||
| Small Heath | NI | . | . | . | . | . | 20 | 38 | 17 | 18 | 6 | 1 | 2 | 1 | . | 9 | 9 | 6 | 1 | . | |||||||
| Ringlet | 23 | . | . | . | . | . | . | 2 | 7 | 5 | 3 | . | . | . | . | . | . | . | . | . | |||||||
| Silver Y | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | |||||||