
| 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 | . | . | . | . | . | . | . | . | . | . | . | 3 | 21 | 7 | 15 | 4 | 5 | . | . | . | . | . | . | |||
| Large Skipper | 72 | . | . | . | . | . | . | . | . | . | 8 | 15 | 21 | 5 | 8 | 7 | . | . | . | . | . | . | . | . | |||
| Dingy Skipper | 5 | . | . | . | . | . | 1 | 1 | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Grizzled Skipper | 18 | . | . | 1 | 2 | . | 6 | 6 | 1 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Brimstone | 70 | 2 | 4 | . | 6 | 15 | 2 | 4 | 1 | . | 9 | 5 | . | . | 2 | . | 7 | 8 | 2 | . | . | 2 | . | . | |||
| Large White | 37 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 9 | 11 | 2 | 8 | . | 4 | 1 | . | . | . | |||
| Small White | 49 | . | . | . | . | . | . | 1 | . | . | . | 2 | . | 1 | 13 | 4 | 8 | 7 | 6 | 5 | . | 2 | . | . | |||
| Green-veined White | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | |||
| Orange Tip | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Green Hairstreak | 5 | . | . | . | . | 1 | . | . | 1 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Small Copper | 11 | . | . | . | . | . | . | 2 | . | . | . | 2 | . | . | . | . | . | 2 | 1 | 1 | . | . | 1 | 1 | |||
| Common Blue | 81 | . | . | . | . | . | . | 3 | 13 | 13 | 12 | 10 | . | . | 1 | . | . | 11 | 10 | 2 | 5 | . | 1 | . | |||
| Chalk-hill Blue | 54 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 12 | 21 | 5 | 6 | 1 | . | . | . | |||
| Duke of Burgundy Fritillary | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||
| Red Admiral | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||
| Painted Lady | 3 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||
| Small Tortoiseshell | 33 | . | 1 | 4 | . | . | . | . | . | . | . | 2 | 2 | 11 | 1 | . | . | . | 2 | 6 | 2 | 1 | . | . | |||
| Peacock | 100 | . | 3 | 3 | 4 | 1 | . | . | 1 | 1 | . | . | . | . | 5 | 17 | 54 | 5 | 3 | 1 | 1 | . | . | . | |||
| Comma | 11 | 1 | . | . | . | . | . | . | . | . | . | . | . | 4 | 2 | . | . | . | . | . | . | . | . | 1 | |||
| Silver-washed Fritillary | 5 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | 1 | 1 | . | . | . | . | . | . | |||
| Speckled Wood | 21 | . | . | . | 2 | 2 | 2 | . | 1 | 2 | 1 | 4 | . | . | 2 | 2 | 1 | . | . | . | 1 | . | . | . | |||
| Marbled White | 72 | . | . | . | . | . | . | . | . | . | . | . | 8 | 25 | 9 | 3 | . | . | . | . | . | . | . | . | |||
| Gatekeeper / Hedge Brown | 181 | . | . | . | . | . | . | . | . | . | . | . | . | . | 14 | 36 | 34 | 25 | 7 | 6 | . | . | . | . | |||
| Meadow Brown | 607 | . | . | . | . | . | . | . | . | . | . | 9 | 36 | 74 | 44 | 47 | 72 | 84 | 111 | 61 | 46 | 12 | 10 | 2 | |||
| Small Heath | 22 | . | . | . | . | . | . | . | 5 | 4 | 5 | 4 | 2 | . | . | . | . | . | 2 | . | . | . | . | . | |||
| Ringlet | 101 | . | . | . | . | . | . | . | . | . | . | . | 18 | 34 | 11 | . | . | . | . | . | . | . | . | . | |||