
| 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/Essex Skipper | . | . | . | . | . | . | . | . | . | 16 | 38 | 120 | 124 | 52 | 24 | . | 2 | . | . | |||||||
| Small Skipper | . | . | . | . | . | . | . | . | 1 | 7 | 37 | 9 | 14 | . | 3 | 2 | . | . | . | |||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | 1 | 23 | 77 | 56 | . | 11 | 1 | . | . | . | |||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||||||
| Brimstone | . | . | 1 | 2 | 1 | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | |||||||
| Large White | . | . | . | . | . | . | . | 1 | . | . | . | 2 | 8 | 1 | 8 | . | 1 | . | . | |||||||
| Small White | . | . | . | . | 1 | . | . | . | . | . | . | 1 | 4 | 3 | . | . | 3 | 10 | 11 | |||||||
| Green-veined White | . | . | 4 | 7 | 11 | 3 | . | . | . | . | 1 | . | 5 | 2 | 2 | 3 | 2 | 1 | 7 | |||||||
| Orange Tip | . | . | . | 3 | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | . | . | . | 6 | 8 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | . | . | . | . | 1 | 4 | 1 | 5 | 1 | . | . | 1 | . | 2 | 3 | 2 | 3 | . | . | |||||||
| Brown Argus | . | . | . | . | . | 3 | 4 | 9 | . | . | . | . | . | 1 | 11 | 4 | 3 | 1 | . | |||||||
| Common Blue | . | . | . | . | . | 10 | 14 | 40 | 3 | . | . | . | 1 | 3 | 15 | 18 | 9 | 2 | 4 | |||||||
| Holly Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | |||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 3 | . | . | |||||||
| Small Tortoiseshell | . | 2 | 4 | 3 | . | . | . | . | . | . | . | 2 | 2 | . | . | . | 3 | 3 | 2 | |||||||
| Peacock | 2 | 3 | 15 | 13 | 7 | . | 1 | . | . | . | . | . | 1 | 4 | 3 | . | . | . | . | |||||||
| Comma | . | 1 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 1 | . | 1 | . | 1 | |||||||
| Speckled Wood | . | . | 3 | 4 | 1 | 2 | 4 | 3 | 1 | 3 | 1 | 1 | 1 | 1 | 5 | 2 | 4 | 3 | 5 | |||||||
| Wall Brown | . | . | . | . | 10 | 14 | . | . | . | . | . | . | . | 7 | 13 | 5 | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 36 | 77 | 46 | 81 | 13 | 5 | . | . | |||||||
| Meadow Brown | . | . | . | . | . | . | . | . | 7 | 10 | 45 | 68 | 102 | 83 | 186 | 58 | 48 | 5 | 9 | |||||||
| Small Heath | . | . | . | . | . | 3 | 5 | 15 | 8 | 19 | 7 | 1 | 3 | . | . | . | 2 | . | 1 | |||||||
| Ringlet | . | . | . | . | . | . | . | . | 13 | 25 | 32 | 5 | 7 | 2 | 1 | . | . | . | . | |||||||