
| 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 | 9 | 8 | 14 | 6 | 4 | . | . | . | . | |||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | |||||||
| Large Skipper | . | . | . | . | . | . | 3 | 3 | 7 | 4 | 2 | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | . | . | . | 2 | 10 | 6 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | 8 | 4 | 1 | 8 | 2 | . | . | 1 | . | . | 1 | . | . | . | 2 | . | 1 | . | . | |||||||
| Large White | . | . | . | 1 | 4 | 4 | 4 | 4 | 1 | . | 1 | 3 | 4 | 14 | 44 | 5 | 1 | 1 | . | |||||||
| Small White | . | . | . | . | 1 | . | 1 | . | . | 3 | 3 | 4 | 5 | 6 | 21 | 3 | 2 | 1 | . | |||||||
| Green-veined White | . | . | 3 | 2 | 4 | 3 | 2 | 1 | . | . | 3 | 8 | 6 | 3 | 6 | 8 | 2 | . | . | |||||||
| Orange Tip | . | . | 2 | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | 10 | 2 | 4 | . | 1 | . | . | . | . | |||||||
| Small Copper | . | . | . | . | 1 | . | 1 | . | . | . | 1 | . | 2 | 1 | 6 | 5 | . | . | . | |||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | |||||||
| Common Blue | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | 1 | 3 | 4 | 2 | . | |||||||
| Holly Blue | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Duke of Burgundy Fritillary | . | . | . | . | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| White Admiral | . | . | . | . | . | . | . | . | 3 | 6 | 7 | 4 | 3 | 1 | . | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | . | . | 1 | 2 | 1 | . | 1 | 1 | 1 | 2 | . | 1 | 3 | . | . | |||||||
| Painted Lady | . | . | . | . | . | . | . | 1 | 1 | . | 1 | 1 | . | 1 | 1 | . | . | . | . | |||||||
| Small Tortoiseshell | . | 1 | . | . | . | . | . | 1 | 2 | 9 | 13 | 12 | 2 | . | 1 | . | . | 1 | 1 | |||||||
| Peacock | 6 | 9 | 3 | 8 | 5 | 2 | . | . | . | . | . | . | 9 | 70 | 22 | 2 | . | . | 1 | |||||||
| Comma | 7 | 2 | . | . | . | . | . | . | . | 5 | 7 | 5 | 2 | 1 | . | . | 2 | 1 | . | |||||||
| Pearl-bordered Fritillary | . | . | . | . | 3 | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | 1 | 7 | 17 | 17 | 11 | 18 | 10 | 5 | . | . | . | |||||||
| Speckled Wood | . | . | . | 1 | 3 | 2 | 5 | 4 | 5 | 2 | . | . | . | 3 | 2 | 8 | 15 | 15 | 2 | |||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 8 | 14 | 5 | . | 1 | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 9 | 12 | 27 | 44 | 46 | 37 | 3 | . | . | |||||||
| Meadow Brown | . | . | . | . | . | . | 6 | 17 | 66 | 128 | 133 | 111 | 68 | 36 | 41 | 6 | 1 | . | . | |||||||
| Small Heath | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 1 | . | . | |||||||
| Ringlet | . | . | . | . | . | . | . | 3 | 22 | 77 | 47 | 28 | 5 | 2 | . | . | . | . | . | |||||||