
| 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 | 95 | . | . | . | . | . | . | . | . | . | . | . | 2 | 12 | 16 | 23 | 5 | . | 1 | 1 | . | . | |||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Large Skipper | 12 | . | . | . | . | . | . | . | . | 1 | . | 9 | 2 | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 3 | 2 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Large White | 9 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 5 | 1 | . | 1 | . | 3 | . | . | |||||
| Small White | 16 | . | . | . | . | . | 5 | 1 | 2 | . | . | . | . | . | 1 | . | 1 | 1 | 1 | 1 | 1 | . | |||||
| Green-veined White | 33 | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | 1 | 9 | 4 | 2 | 1 | . | . | . | |||||
| Green Hairstreak | 13 | . | . | . | . | 1 | 4 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Blue | 2 | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | 37 | . | . | . | . | . | 5 | 11 | 6 | 5 | . | 1 | 1 | . | . | . | 1 | . | 1 | 1 | . | 2 | |||||
| Common Blue | 76 | . | . | . | . | . | 2 | 6 | 15 | 13 | 13 | 6 | 8 | 2 | . | . | . | . | 2 | 2 | 1 | 1 | |||||
| Chalk-hill Blue | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | |||||
| Adonis Blue | 54 | . | . | . | . | . | 1 | 12 | 13 | 10 | 6 | 8 | 2 | . | . | . | . | 1 | . | 2 | . | . | |||||
| Holly Blue | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | |||||
| Painted Lady | 10 | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | 1 | 1 | . | . | |||||
| Small Tortoiseshell | 64 | 2 | 3 | 1 | 2 | 1 | 1 | . | . | . | . | . | 2 | 7 | 11 | 5 | 3 | . | . | 3 | 3 | 3 | |||||
| Peacock | 20 | 1 | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | 1 | 4 | . | 1 | . | . | . | |||||
| Dark Green Fritillary | 7 | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 3 | . | . | . | . | . | . | . | |||||
| Wall Brown | 3 | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Marbled White | 99 | . | . | . | . | . | . | . | . | . | . | 1 | 43 | 23 | 3 | 9 | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 70 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 11 | 11 | 12 | . | . | . | . | . | |||||
| Meadow Brown | 290 | . | . | . | . | . | . | . | . | . | 1 | 4 | 32 | 26 | 47 | 40 | 26 | 5 | . | 4 | 1 | 1 | |||||
| Small Heath | 81 | . | . | . | . | . | 4 | 16 | 10 | 7 | 3 | 7 | 12 | 8 | 3 | . | . | . | 1 | . | . | . | |||||
| Ringlet | 29 | . | . | . | . | . | . | . | . | . | . | 1 | 13 | 10 | . | . | . | . | . | . | . | . | |||||