
| 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 | . | . | . | . | . | . | . | . | . | 4 | . | 51 | 69 | 45 | 29 | 4 | 4 | . | . | |||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 7 | 9 | . | . | 1 | . | |||||||
| Large Skipper | . | . | . | . | . | . | 3 | 6 | 12 | 11 | 37 | 12 | 5 | . | . | . | . | . | . | |||||||
| Grizzled Skipper | . | . | . | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Wood White | . | 1 | . | 5 | 13 | 8 | 13 | 13 | 15 | 11 | . | . | . | . | . | . | . | . | . | |||||||
| Clouded Yellow | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | . | 1 | 6 | 6 | 6 | 1 | 2 | . | 1 | . | . | . | 3 | 2 | . | . | . | 5 | . | |||||||
| Small White | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | . | . | 4 | . | . | |||||||
| Green-veined White | . | 1 | 1 | 1 | 2 | . | 3 | 1 | . | . | . | . | 5 | . | 6 | 1 | . | . | . | |||||||
| Orange Tip | . | . | . | 4 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brown Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 1 | . | . | 11 | . | |||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | . | 6 | 10 | . | |||||||
| Common Blue | . | . | . | . | . | . | 2 | 1 | . | 1 | . | . | . | . | . | . | . | 1 | . | |||||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | 5 | . | 1 | 1 | . | 1 | . | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | |||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | . | . | |||||||
| Peacock | 2 | . | 4 | . | . | . | . | . | . | . | . | . | . | 2 | 3 | . | 2 | . | . | |||||||
| Pearl-bordered Fritillary | . | . | . | . | 13 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | . | 2 | 4 | 6 | 5 | 1 | . | . | 6 | 2 | . | . | 3 | 1 | 5 | 15 | 9 | 22 | 17 | |||||||
| Wall Brown | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 43 | 85 | 79 | 67 | 30 | 9 | 6 | . | |||||||
| Meadow Brown | . | . | . | . | . | . | 1 | . | 5 | 23 | 83 | 28 | 17 | 22 | 17 | 5 | 1 | . | . | |||||||
| Small Heath | . | . | . | . | . | 3 | 1 | 4 | 8 | 2 | 1 | . | . | . | . | . | . | . | . | |||||||
| Ringlet | . | . | . | . | . | . | . | . | . | . | 17 | 28 | 30 | 10 | 5 | . | . | . | . | |||||||
| Unknown Fritillary | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||
| Unknown | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | . | . | . | . | |||||||