
| 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 | . | . | . | . | . | . | . | . | . | 38 | 44 | 24 | . | . | . | . | . | |||||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||||||
| Large Skipper | . | . | . | . | . | . | . | 91 | 63 | 56 | 2 | 1 | . | . | . | . | . | |||||||||
| Dingy Skipper | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 4 | 6 | 2 | 4 | 2 | 2 | 1 | . | . | . | . | 4 | . | . | 2 | . | 2 | |||||||||
| Large White | . | . | . | . | . | 1 | . | . | . | 2 | 2 | 16 | 1 | 1 | . | 6 | . | |||||||||
| Small White | . | . | . | . | 1 | . | . | 2 | . | 5 | 18 | 39 | 10 | 17 | 5 | . | . | |||||||||
| Green-veined White | . | 2 | 6 | 5 | . | . | 1 | . | . | . | 5 | 10 | 3 | 9 | 1 | 4 | 2 | |||||||||
| Orange Tip | . | . | 4 | 7 | 1 | 1 | . | . | 1 | . | . | . | . | . | . | . | . | |||||||||
| Green Hairstreak | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | 2 | 2 | . | . | . | . | . | 1 | 2 | . | . | . | 1 | . | |||||||||
| Brown Argus | . | . | . | . | . | 3 | 3 | 9 | . | . | 1 | 9 | 17 | 17 | 15 | 8 | 7 | |||||||||
| Common Blue | . | . | . | . | 1 | 44 | 34 | 39 | 16 | 5 | . | 51 | 41 | 43 | 31 | 63 | 37 | |||||||||
| Holly Blue | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | |||||||||
| Duke of Burgundy Fritillary | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | . | 1 | 1 | . | . | . | 3 | . | 1 | . | . | |||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | |||||||||
| Small Tortoiseshell | 2 | 1 | 1 | 1 | 1 | 1 | . | . | 2 | 5 | 5 | 5 | 3 | 5 | 3 | 20 | 5 | |||||||||
| Peacock | . | 1 | 2 | 3 | . | . | . | . | . | . | 1 | 3 | 4 | 2 | . | 2 | . | |||||||||
| Comma | . | 2 | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | . | . | |||||||||
| Speckled Wood | . | . | 1 | 2 | 2 | 3 | 7 | 11 | 4 | 6 | . | 1 | . | 1 | 1 | 3 | 2 | |||||||||
| Wall Brown | . | . | 1 | 9 | . | 4 | . | . | . | . | . | 1 | 13 | . | 5 | 4 | . | |||||||||
| Marbled White | . | . | . | . | . | . | . | . | 4 | 110 | 65 | 23 | . | . | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 9 | 25 | 15 | 5 | 3 | . | 1 | . | |||||||||
| Meadow Brown | . | . | . | . | . | . | . | 36 | 109 | 146 | 95 | 85 | 16 | 15 | 4 | 6 | . | |||||||||
| Small Heath | . | . | . | 17 | 14 | 38 | 21 | 84 | 47 | 71 | 14 | 8 | 17 | 15 | 32 | 37 | 35 | |||||||||
| Ringlet | . | . | . | . | . | . | . | . | 13 | 30 | 4 | 1 | . | . | . | . | . | |||||||||