
| 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 | 14 | . | . | . | . | . | . | . | . | 15 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Skipper | 2 | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | |||||
| Large Skipper | 22 | . | . | . | . | . | . | 4 | 8 | 1 | 6 | 1 | . | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | NI | 8 | 6 | 1 | 2 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Large White | 23 | . | . | . | 1 | . | . | . | . | 1 | 1 | 1 | 8 | 1 | 6 | . | . | . | 2 | . | . | . | |||||
| Small White | 8 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 1 | . | . | 1 | 4 | . | . | . | |||||
| Green-veined White | 5 | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||
| Green Hairstreak | NI | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 18 | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 3 | 8 | . | 2 | |||||
| Silver-studded Blue | 11 | . | . | . | . | . | . | . | 4 | 2 | . | 5 | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | NI | . | . | . | . | 5 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||
| Common Blue | NI | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Holly Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | . | |||||
| Red Admiral | 21 | 2 | . | . | . | . | . | . | . | 7 | 4 | 2 | . | 1 | . | . | . | . | 1 | . | 2 | 1 | |||||
| Painted Lady | 10 | . | . | 4 | . | . | . | 1 | . | . | . | 1 | 1 | 1 | . | . | . | 1 | . | . | . | . | |||||
| Small Tortoiseshell | 5 | . | 1 | . | . | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Peacock | 16 | . | 3 | . | . | . | . | . | . | . | . | . | 6 | . | 3 | . | . | . | . | . | 1 | . | |||||
| Comma | 8 | . | . | . | . | . | . | . | . | 3 | . | . | 1 | . | . | . | . | . | . | . | 4 | . | |||||
| Speckled Wood | 14 | . | . | 5 | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | 1 | 1 | 1 | 1 | |||||
| Grayling | 33 | . | . | . | . | . | . | . | . | . | 1 | 1 | 9 | 4 | 8 | . | 7 | . | 2 | 2 | . | . | |||||
| Gatekeeper / Hedge Brown | 114 | . | . | . | . | . | . | . | . | . | 2 | 16 | 43 | 19 | 21 | 3 | . | 6 | 5 | . | 1 | . | |||||
| Meadow Brown | 91 | . | . | . | . | . | 2 | . | 10 | 26 | 16 | 15 | 6 | 1 | 8 | 1 | . | 2 | 2 | 3 | . | . | |||||
| Small Heath | 25 | . | . | . | . | . | 2 | 5 | . | 1 | 1 | 3 | . | . | . | . | . | 1 | 11 | 1 | . | 1 | |||||
| Ringlet | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||