
| 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 | 86 | . | . | . | . | 1 | . | 1 | 2 | 21 | 16 | 26 | 6 | 1 | . | . | . | . | |||||||||
| Large Skipper | 49 | . | . | . | . | . | . | 5 | 2 | 11 | 8 | 12 | 4 | 1 | . | . | . | . | |||||||||
| Dingy Skipper | NI | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Grizzled Skipper | 8 | . | . | 2 | 2 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Clouded Yellow | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | |||||||||
| Brimstone | NI | 7 | 3 | 15 | 13 | 8 | 1 | 2 | 5 | . | 5 | 12 | 20 | 9 | 11 | . | 1 | . | |||||||||
| Large White | NI | . | . | . | . | . | . | . | . | 2 | 12 | 14 | 13 | 8 | 40 | 16 | 16 | 7 | |||||||||
| Small White | 374 | . | . | . | 1 | . | . | 1 | . | 12 | 8 | 48 | 20 | 23 | 88 | 54 | 21 | 7 | |||||||||
| Green-veined White | NI | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | 2 | |||||||||
| Orange Tip | NI | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Blue | 6 | . | . | . | 1 | . | . | 1 | . | . | . | 1 | . | 2 | 1 | . | . | . | |||||||||
| Brown Argus | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | 4 | 3 | . | 2 | 1 | |||||||||
| Common Blue | 99 | . | . | . | 1 | 3 | 2 | 3 | 3 | 1 | . | 2 | 10 | 27 | 21 | 5 | 4 | . | |||||||||
| Chalk-hill Blue | 16 | . | . | . | . | . | . | . | . | . | . | . | 2 | 8 | 2 | 1 | 1 | . | |||||||||
| Adonis Blue | 29 | . | . | . | 1 | 2 | 1 | . | . | . | . | . | . | 1 | 4 | 4 | 3 | 1 | |||||||||
| Duke of Burgundy Fritillary | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||||
| Red Admiral | 15 | . | . | . | . | . | . | . | 1 | . | . | 3 | 3 | 2 | 1 | 2 | . | 1 | |||||||||
| Painted Lady | 22 | . | . | . | . | . | 1 | . | . | 2 | . | 8 | . | 4 | 4 | . | . | . | |||||||||
| Small Tortoiseshell | 124 | . | . | . | . | . | . | . | 1 | . | . | 3 | 38 | 41 | 27 | . | . | . | |||||||||
| Peacock | 34 | 1 | . | . | . | . | . | . | . | . | . | 18 | 10 | 4 | 1 | . | . | . | |||||||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| Dark Green Fritillary | 32 | . | . | . | 1 | . | . | 2 | 2 | 9 | 1 | 8 | 1 | 1 | 1 | . | . | . | |||||||||
| Silver-washed Fritillary | 14 | . | . | . | . | . | . | 1 | . | 4 | 1 | 4 | 2 | . | . | . | . | . | |||||||||
| Speckled Wood | 6 | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 2 | . | 1 | . | |||||||||
| Marbled White | 138 | . | . | . | . | . | . | 6 | 24 | 55 | 10 | 2 | 1 | . | . | . | . | . | |||||||||
| Gatekeeper / Hedge Brown | 87 | . | . | . | . | . | . | . | . | 1 | 9 | 42 | 16 | 6 | 9 | . | . | . | |||||||||
| Meadow Brown | 416 | . | . | . | . | . | . | 3 | 17 | 42 | 26 | 45 | 28 | 56 | 59 | 33 | 15 | 6 | |||||||||
| Small Heath | 391 | . | . | . | 21 | 13 | 10 | 19 | 39 | 23 | 3 | 3 | 13 | 24 | 53 | 41 | 15 | 6 | |||||||||
| Ringlet | 120 | . | . | . | . | . | . | 9 | 26 | 34 | 14 | 5 | 1 | . | . | 1 | . | . | |||||||||