
| 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 | . | . | . | 8 | 11 | 9 | 21 | 30 | 13 | 8 | 2 | . | . | . | . | . | . | |||||||||
| Essex Skipper | . | . | . | . | . | . | 5 | 3 | 2 | 1 | 1 | . | . | . | . | . | . | |||||||||
| Large Skipper | . | . | . | . | . | 22 | 9 | 3 | 4 | 1 | 1 | . | . | . | . | . | . | |||||||||
| Dingy Skipper | 12 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Brimstone | 1 | 2 | . | 2 | . | . | 3 | 1 | . | . | . | . | 2 | 1 | . | . | . | |||||||||
| Large White | 1 | 1 | . | 1 | . | . | 4 | . | . | 2 | . | . | . | . | 1 | 1 | 1 | |||||||||
| Small White | 1 | 2 | . | . | . | . | . | 2 | 1 | 1 | 2 | 1 | . | . | 1 | . | . | |||||||||
| Green-veined White | . | . | . | . | . | . | . | . | 2 | . | 2 | . | . | . | . | . | . | |||||||||
| Green Hairstreak | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Small Copper | . | . | . | . | . | . | . | . | 2 | 2 | . | . | . | 1 | 3 | 6 | 2 | |||||||||
| Brown Argus | . | . | . | . | . | . | . | . | 1 | 13 | 12 | 7 | 2 | 1 | . | 1 | . | |||||||||
| Common Blue | 3 | 15 | . | 13 | 6 | 2 | . | 1 | 7 | 45 | 59 | 104 | 49 | 11 | . | . | . | |||||||||
| Duke of Burgundy Fritillary | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | . | |||||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||||
| Small Tortoiseshell | . | . | . | 1 | . | . | 1 | . | . | . | 1 | . | . | 1 | . | . | . | |||||||||
| Peacock | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | |||||||||
| Speckled Wood | . | 1 | . | 2 | 1 | 1 | 1 | 2 | 3 | 2 | . | 1 | . | 1 | . | . | . | |||||||||
| Wall Brown | 5 | 13 | . | . | . | . | . | . | 3 | 6 | 15 | 12 | 11 | 4 | . | 1 | . | |||||||||
| Marbled White | . | . | . | . | . | 15 | 37 | 29 | 23 | 2 | . | . | . | . | . | . | . | |||||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | 1 | 7 | 9 | 12 | 2 | 2 | . | . | . | . | . | |||||||||
| Meadow Brown | . | . | . | 5 | 36 | 81 | 54 | 32 | 38 | 39 | 31 | 20 | 2 | . | . | . | . | |||||||||
| Small Heath | 13 | 35 | . | 51 | 45 | 76 | 25 | 11 | 6 | 3 | 5 | 26 | 46 | 48 | 36 | 19 | 4 | |||||||||
| Ringlet | . | . | . | . | . | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | |||||||||
| Unknown | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||||||
| Unknown | . | . | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||||
| Unknown | . | . | . | . | . | 19 | 47 | 71 | 63 | 19 | 2 | . | . | . | . | . | . | |||||||||