
| 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 | ||||||||||||||||||||||||||
| Small Skipper | . | . | . | . | . | . | . | . | . | . | 6 | 19 | 24 | 5 | . | . | . | . | ||||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | 8 | 14 | . | . | . | . | . | . | . | ||||||||
| Brimstone | 8 | 6 | 9 | 8 | 3 | 2 | . | . | . | 1 | . | 4 | 5 | . | . | . | 1 | . | ||||||||
| Large White | . | . | . | . | . | . | . | 1 | . | 6 | 10 | 9 | 3 | 14 | . | 1 | . | . | ||||||||
| Small White | 1 | 2 | 2 | 5 | . | . | . | 2 | . | . | . | . | 2 | 4 | . | 1 | . | . | ||||||||
| Green-veined White | 1 | 1 | 4 | 14 | 6 | 9 | 2 | 2 | 4 | . | 52 | 47 | 38 | 24 | 2 | 1 | . | . | ||||||||
| Orange Tip | . | 2 | 6 | 21 | 3 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||||||
| Common Blue | . | . | . | . | . | 1 | . | 2 | . | 4 | . | . | 17 | 32 | 10 | 2 | 1 | . | ||||||||
| Holly Blue | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | 1 | 2 | 1 | . | ||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | ||||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Peacock | 12 | 12 | 2 | 15 | 4 | 2 | . | . | . | . | . | 10 | 22 | 4 | . | . | 1 | . | ||||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||||
| Speckled Wood | 2 | 2 | 5 | 4 | 8 | 3 | 21 | 9 | 18 | 16 | 7 | 16 | 6 | 20 | 26 | 24 | 6 | 4 | ||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | 2 | 22 | 63 | 27 | 4 | 26 | . | 1 | . | . | ||||||||
| Meadow Brown | . | . | . | . | . | . | . | 8 | 26 | 97 | 143 | 63 | 56 | 35 | 29 | 1 | . | . | ||||||||
| Small Heath | . | . | . | . | . | 2 | 2 | 2 | . | 8 | 7 | . | . | . | . | . | . | . | ||||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 32 | 66 | 16 | 4 | . | . | . | . | . | ||||||||