
| 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 | . | . | . | . | . | . | . | . | . | . | 10 | 35 | 26 | 20 | 30 | 9 | 2 | . | . | . | . | . | ||||
| Large Skipper | 24 | . | . | . | . | . | . | . | . | . | 6 | 5 | 2 | 4 | 5 | 2 | . | . | . | . | . | . | . | ||||
| Dingy Skipper | 5 | . | . | . | . | . | 1 | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | 8 | . | . | . | 6 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 51 | . | 3 | 2 | 11 | 1 | 7 | 2 | 2 | 2 | 1 | . | . | 10 | 8 | . | 1 | 1 | . | . | . | . | . | ||||
| Large White | 25 | . | . | 1 | . | . | . | 3 | . | 5 | . | . | 2 | . | 4 | 3 | 2 | 1 | . | 1 | 2 | . | 1 | ||||
| Small White | 33 | . | 2 | . | . | . | 1 | . | . | . | . | . | 4 | 5 | 7 | 4 | 3 | 3 | 2 | 1 | 1 | . | . | ||||
| Orange Tip | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | 27 | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | 3 | . | 2 | . | 2 | 7 | 5 | 5 | ||||
| Brown Argus | 11 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 1 | 2 | 2 | . | . | . | . | ||||
| Common Blue | 133 | . | . | . | . | . | 2 | 2 | 5 | 6 | 5 | 1 | 1 | 10 | 12 | 16 | 17 | 21 | 24 | 4 | 3 | 4 | . | ||||
| Chalk-hill Blue | 177 | . | . | . | . | . | . | . | . | . | . | . | 4 | 6 | 34 | 36 | 38 | 32 | 12 | 14 | . | 1 | . | ||||
| Holly Blue | 40 | . | . | . | 4 | 1 | 1 | . | . | . | . | . | 3 | 9 | 4 | 4 | 8 | 3 | 3 | . | . | . | . | ||||
| Duke of Burgundy Fritillary | 2 | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | 3 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | ||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Tortoiseshell | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||
| Peacock | 15 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 3 | 3 | 1 | . | . | . | . | . | ||||
| Comma | 4 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | 1 | . | ||||
| Silver-washed Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| Speckled Wood | 32 | . | . | 2 | 1 | 2 | 2 | 2 | 1 | 1 | . | . | 1 | 3 | . | 3 | 5 | 3 | 1 | 1 | . | 1 | 1 | ||||
| Marbled White | 20 | . | . | . | . | . | . | . | . | . | . | 7 | 6 | 5 | 2 | . | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 21 | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 2 | 11 | 2 | 1 | 1 | 1 | . | . | . | ||||
| Meadow Brown | 271 | . | . | . | . | . | . | . | . | . | 8 | 34 | 37 | 24 | 45 | 41 | 25 | 19 | 16 | 7 | 10 | 5 | . | ||||
| Small Heath | 124 | . | . | . | . | . | 5 | 5 | 1 | 3 | 1 | . | . | 1 | . | 3 | 26 | 20 | 19 | 16 | 14 | 10 | . | ||||
| Ringlet | 69 | . | . | . | . | . | . | . | . | . | . | 12 | 26 | 13 | 12 | 4 | 1 | 1 | . | . | . | . | . | ||||