
| 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 | . | . | . | . | . | . | . | . | . | . | 3 | 25 | 26 | 13 | 25 | 7 | 4 | . | . | . | . | . | ||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 7 | . | 2 | . | . | . | . | . | ||||
| Large Skipper | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| Dingy Skipper | 81 | . | . | . | 1 | 2 | 34 | 23 | 12 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Grizzled Skipper | 28 | . | . | . | 1 | 2 | 8 | 8 | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Brimstone | 39 | . | . | 1 | . | 1 | 1 | 1 | 1 | 2 | 1 | . | . | . | 5 | 1 | 2 | 6 | 5 | 9 | 1 | . | . | ||||
| Large White | 14 | . | . | . | . | . | . | 1 | 3 | . | . | . | . | . | . | . | 1 | 3 | 1 | 2 | 1 | . | . | ||||
| Small White | 72 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 2 | 17 | 36 | 2 | 4 | 2 | . | 1 | ||||
| Green-veined White | 28 | . | . | . | . | . | 1 | 1 | 1 | 1 | 1 | . | . | . | 3 | 6 | 10 | 3 | . | . | . | . | . | ||||
| Orange Tip | 11 | . | 1 | . | . | . | . | 2 | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Green Hairstreak | 5 | . | . | . | 1 | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Small Copper | 13 | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | 2 | 4 | 4 | 1 | . | . | . | ||||
| Small Blue | 11 | . | . | . | . | . | 2 | 2 | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Common Blue | 71 | . | . | . | . | . | . | . | . | 13 | 2 | 4 | 1 | . | . | . | 5 | 1 | 14 | 10 | 9 | 5 | . | ||||
| Chalk-hill Blue | 26 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 13 | 3 | 5 | . | . | . | ||||
| Adonis Blue | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Duke of Burgundy Fritillary | 8 | . | . | 1 | . | . | . | 1 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Small Tortoiseshell | 30 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | 5 | . | 3 | 4 | 7 | 7 | ||||
| Peacock | 18 | . | 1 | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | 1 | 1 | 9 | . | . | . | . | 2 | ||||
| Dark Green Fritillary | 14 | . | . | . | . | . | . | . | . | . | . | . | 8 | 2 | 3 | 1 | . | . | . | . | . | . | . | ||||
| Speckled Wood | 8 | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 3 | 3 | . | ||||
| Marbled White | 147 | . | . | . | . | . | . | . | . | . | . | 48 | 43 | 39 | 9 | 8 | . | . | . | . | . | . | . | ||||
| Gatekeeper / Hedge Brown | 130 | . | . | . | . | . | . | . | . | . | . | . | 18 | 22 | 37 | 24 | 16 | 11 | 2 | . | . | . | . | ||||
| Meadow Brown | 1383 | . | . | . | . | . | . | . | . | . | 17 | 123 | 109 | 170 | 193 | 163 | 226 | 226 | 47 | 36 | 48 | 14 | 11 | ||||
| Small Heath | 428 | . | . | . | . | . | 1 | 2 | 13 | 30 | 38 | 68 | 79 | 87 | 17 | 20 | 4 | 8 | 11 | 15 | 6 | 3 | 3 | ||||
| Ringlet | 7 | . | . | . | . | . | . | . | . | . | . | . | 3 | 3 | 1 | . | . | . | . | . | . | . | . | ||||