
| 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 | . | . | . | . | . | . | . | . | . | 6 | 8 | 12 | 2 | . | . | . | . | |||||||||
| Large Skipper | . | . | . | . | . | . | . | 6 | 9 | 4 | 7 | 3 | 5 | 1 | . | . | . | |||||||||
| Dingy Skipper | . | . | . | . | 2 | 4 | 3 | 1 | . | . | . | 1 | . | . | . | . | . | |||||||||
| Large White | . | . | . | . | 1 | . | . | . | . | 1 | 1 | 7 | 2 | 1 | . | . | . | |||||||||
| Small White | . | 1 | . | 3 | . | . | 1 | 1 | . | 4 | 2 | 11 | 3 | 6 | 1 | 10 | 2 | |||||||||
| Green-veined White | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Orange Tip | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | . | 1 | . | . | . | . | . | 1 | . | . | 1 | . | . | . | |||||||||
| Brown Argus | . | . | . | . | . | 2 | 5 | 3 | 2 | . | . | 1 | 3 | 2 | 3 | 2 | 3 | |||||||||
| Common Blue | . | . | . | . | . | 11 | 23 | 15 | 12 | . | . | 1 | 4 | 10 | 9 | 8 | 4 | |||||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 1 | . | . | |||||||||
| Adonis Blue | . | . | . | . | . | 4 | 14 | 4 | 2 | . | . | . | . | 2 | 11 | 20 | 10 | |||||||||
| Painted Lady | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | |||||||||
| Small Tortoiseshell | 9 | 15 | 19 | 18 | 4 | . | 4 | 8 | 5 | 6 | 10 | 1 | 2 | 2 | . | . | . | |||||||||
| Peacock | 2 | . | 1 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | |||||||||
| Speckled Wood | . | . | . | 1 | . | . | . | . | 1 | . | 1 | . | . | . | 1 | 2 | 1 | |||||||||
| Wall Brown | . | . | . | . | 5 | 1 | . | . | . | . | . | 2 | 2 | 12 | . | . | . | |||||||||
| Marbled White | . | . | . | . | . | . | . | . | 2 | 35 | 79 | 30 | 46 | 13 | 1 | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 1 | 17 | 21 | 17 | . | . | . | |||||||||
| Meadow Brown | . | . | . | . | . | . | . | 9 | 8 | 25 | 62 | 114 | 119 | 126 | 50 | 17 | 11 | |||||||||
| Small Heath | . | . | . | . | 16 | 27 | 50 | 45 | 37 | 4 | . | . | 3 | 16 | 16 | 13 | 5 | |||||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | |||||||||