
| 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 | ||||||||||||||||||||||||||
| Small/Essex Skipper | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | |||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | 31 | 41 | 74 | 13 | 11 | . | 1 | . | . | . | |||||
| Large Skipper | . | . | . | . | . | 1 | 5 | . | 2 | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | 3 | 7 | 13 | 6 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 1 | 6 | 1 | 4 | 12 | 4 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | 1 | |||||
| Brimstone | . | 3 | 3 | 2 | 2 | 3 | . | . | . | 1 | 1 | 10 | 3 | . | 1 | 3 | . | . | 1 | . | . | |||||
| Large White | . | 1 | . | 1 | 1 | . | . | . | 1 | 3 | 3 | 10 | 12 | 5 | 1 | 1 | 1 | 1 | 1 | . | . | |||||
| Small White | . | . | . | . | . | . | . | . | . | 3 | 6 | 9 | 3 | 3 | 5 | 9 | 1 | 4 | . | 1 | . | |||||
| Green-veined White | 1 | 1 | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | |||||
| Green Hairstreak | . | . | . | 4 | 5 | 3 | 3 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | 4 | 5 | . | . | . | 1 | . | . | 7 | . | 1 | . | . | . | 1 | 8 | 2 | 1 | |||||
| Small Blue | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||||
| Brown Argus | . | . | 2 | 29 | 17 | 6 | 6 | 1 | . | . | . | 8 | 8 | 19 | 6 | 14 | 2 | 2 | 3 | . | 1 | |||||
| Common Blue | . | . | 4 | 27 | 55 | 85 | 95 | 24 | 22 | . | . | 7 | 12 | 50 | 102 | 112 | 22 | 23 | 14 | 5 | . | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 9 | 1 | 2 | 2 | 2 | 1 | . | . | . | . | |||||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Holly Blue | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | |||||
| Duke of Burgundy Fritillary | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | 1 | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | |||||
| Painted Lady | . | . | . | 2 | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | |||||
| Peacock | 3 | 1 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||||
| Pearl-bordered Fritillary | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Dark Green Fritillary | . | . | . | . | . | . | 3 | 22 | 80 | 51 | 27 | 15 | 3 | . | . | . | . | . | . | . | . | |||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | . | . | . | . | . | 3 | 6 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||||
| Wall Brown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 2 | . | . | . | . | . | |||||
| Marbled White | . | . | . | . | . | . | . | 4 | 14 | 25 | 12 | 2 | . | . | . | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 1 | . | 5 | 1 | 5 | . | . | . | . | . | . | . | |||||
| Meadow Brown | . | . | . | . | . | . | 1 | . | 7 | 10 | 59 | 278 | 427 | 401 | 289 | 282 | 182 | 121 | 71 | 36 | 6 | |||||
| Small Heath | . | . | . | 2 | 5 | 8 | 41 | 19 | 83 | 34 | 31 | 15 | 4 | 1 | . | 14 | 5 | 18 | 15 | 8 | 3 | |||||
| Ringlet | . | . | . | . | . | . | . | . | 2 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | |||||