
| 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 | . | . | . | . | . | . | . | 2 | 2 | 24 | 23 | 6 | 7 | 8 | . | 1 | . | . | ||||||||
| Large Skipper | 56 | . | . | . | . | . | . | . | . | 1 | 12 | 14 | 6 | 6 | 5 | . | . | . | . | ||||||||
| Dingy Skipper | 6 | . | . | 2 | 1 | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | 10 | . | . | 3 | . | . | 1 | 2 | . | 1 | . | . | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | NI | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 1 | . | 1 | 1 | . | ||||||||
| Brimstone | 140 | 2 | 2 | 18 | 6 | 16 | 8 | 7 | 6 | 5 | 1 | . | 8 | 18 | 15 | 2 | 5 | . | . | ||||||||
| Large White | 116 | . | . | . | . | . | . | . | 1 | 1 | 2 | 11 | 13 | 23 | 24 | 14 | 5 | . | 1 | ||||||||
| Small White | NI | . | 1 | . | 1 | 4 | . | . | . | . | 3 | 24 | 24 | 7 | 16 | 9 | 15 | 2 | 1 | ||||||||
| Green-veined White | 3 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | ||||||||
| Orange Tip | NI | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | NI | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | NI | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | . | ||||||||
| Small Blue | 16 | . | . | . | . | 2 | 4 | . | 2 | 1 | . | . | . | 2 | 2 | 1 | . | 2 | . | ||||||||
| Brown Argus | 21 | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 6 | 5 | 7 | 1 | . | ||||||||
| Common Blue | 137 | . | . | . | . | . | 4 | 6 | 7 | 7 | 2 | 1 | 13 | 20 | 16 | 18 | 14 | 5 | 1 | ||||||||
| Chalk-hill Blue | 15 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | 3 | 4 | . | . | ||||||||
| Adonis Blue | NI | . | . | . | . | . | 2 | 1 | 1 | 5 | . | . | . | 2 | 1 | 5 | 6 | 2 | 1 | ||||||||
| Holly Blue | 2 | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| White Admiral | 2 | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | 7 | . | . | . | 1 | . | . | . | . | . | . | 1 | 1 | . | . | 1 | . | . | . | ||||||||
| Peacock | 23 | 1 | . | . | 1 | . | . | . | . | 1 | . | . | 3 | 13 | 2 | . | . | . | . | ||||||||
| Comma | 1 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||||
| Dark Green Fritillary | 25 | . | . | . | . | . | . | . | . | . | 6 | 4 | 6 | 4 | 1 | . | . | . | . | ||||||||
| Silver-washed Fritillary | 12 | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | 3 | . | . | . | . | . | ||||||||
| Speckled Wood | 17 | . | . | 1 | . | . | 1 | 3 | 1 | 2 | . | . | . | 1 | . | 2 | 2 | . | . | ||||||||
| Marbled White | 110 | . | . | . | . | . | . | . | . | 20 | 25 | 33 | 2 | 1 | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | 4 | 43 | 28 | 13 | 8 | 1 | . | . | . | ||||||||
| Meadow Brown | 611 | . | . | . | . | . | . | . | . | 31 | 36 | 66 | 58 | 73 | 77 | 76 | 43 | 12 | 8 | ||||||||
| Small Heath | 195 | . | . | . | 2 | 8 | 24 | 10 | 37 | 30 | 14 | 14 | . | . | 2 | 13 | 9 | 1 | . | ||||||||
| Ringlet | 48 | . | . | . | . | . | . | . | . | 4 | 13 | 13 | . | 1 | 1 | 2 | . | . | . | ||||||||