
| 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 | . | . | . | . | . | . | . | . | . | . | . | 20 | 22 | 1 | 2 | . | . | . | . | . | . | |||||
| Silver-spotted Skipper | 37 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | . | 11 | 9 | . | . | . | |||||
| Large Skipper | 23 | . | . | . | . | . | . | . | . | 11 | 2 | 2 | 3 | 2 | . | 1 | . | . | . | . | . | . | |||||
| Dingy Skipper | 3 | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 3 | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | 4 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | . | |||||
| Brimstone | 59 | 1 | 2 | 1 | 4 | 5 | . | 7 | 2 | 5 | 1 | . | . | . | 6 | 12 | . | . | . | . | . | . | |||||
| Large White | 33 | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 12 | . | 7 | 3 | . | 1 | . | 1 | |||||
| Small White | 77 | . | . | . | 1 | 1 | 1 | . | . | 1 | . | 1 | 1 | 4 | 3 | 2 | 10 | 21 | 9 | 1 | 4 | 3 | |||||
| Green-veined White | 21 | . | . | . | . | . | 2 | . | . | . | . | . | 1 | . | 1 | 7 | 2 | . | . | 3 | 1 | 3 | |||||
| Orange Tip | 2 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Small Copper | 12 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | . | 4 | 2 | 4 | |||||
| Brown Argus | 10 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 1 | 1 | 1 | 1 | 1 | |||||
| Common Blue | 83 | . | . | . | 1 | 10 | . | 4 | 1 | . | . | . | . | 1 | 8 | 24 | 1 | 4 | 2 | 3 | 5 | 3 | |||||
| Chalk-hill Blue | 83 | . | . | . | . | . | . | . | . | . | 1 | . | . | 4 | 22 | 26 | . | 3 | 1 | . | . | . | |||||
| Red Admiral | 8 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 3 | 1 | . | . | . | . | . | . | |||||
| Painted Lady | 4 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 30 | . | . | . | . | . | . | . | 1 | 4 | 5 | 1 | . | 1 | 1 | 9 | . | . | . | . | . | . | |||||
| Peacock | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | |||||
| Comma | 17 | 1 | 1 | . | . | . | . | . | . | . | 1 | 3 | . | 1 | 3 | 1 | 1 | . | . | . | . | . | |||||
| Dark Green Fritillary | 4 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | 11 | 1 | 1 | 1 | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | 3 | 2 | 2 | |||||
| Marbled White | 34 | . | . | . | . | . | . | . | . | . | . | 7 | 20 | 3 | . | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 107 | . | . | . | . | . | . | . | . | . | . | . | 2 | 11 | 31 | 30 | . | 1 | 1 | . | . | . | |||||
| Meadow Brown | 496 | . | . | . | . | . | . | . | . | 2 | 23 | 28 | 55 | 45 | 65 | 46 | 12 | 51 | 35 | 4 | 5 | 6 | |||||
| Small Heath | 38 | . | . | . | . | . | . | 1 | 2 | 1 | 6 | 1 | . | . | . | . | 10 | 4 | 3 | 2 | . | 1 | |||||
| Ringlet | 39 | . | . | . | . | . | . | . | . | . | 6 | 11 | 12 | 2 | . | . | . | . | . | . | . | . | |||||