
| 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 | . | . | . | . | . | . | 2 | 4 | . | 20 | 2 | 2 | . | . | . | . | . | . | . | |||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 6 | . | . | . | . | |||||||
| Large Skipper | . | . | . | . | . | . | . | . | . | . | . | 12 | 8 | . | 4 | 6 | . | . | . | |||||||
| Brimstone | 8 | 22 | . | 28 | 4 | 2 | . | 2 | . | . | . | . | 4 | 2 | 48 | . | 4 | 2 | . | |||||||
| Large White | . | . | . | . | 4 | 2 | 2 | . | . | 8 | 2 | 26 | 6 | 6 | 16 | 28 | 14 | 6 | 2 | |||||||
| Small White | . | 2 | 4 | 12 | 2 | 2 | . | . | . | 12 | . | 14 | 4 | 6 | 8 | 12 | 4 | 4 | . | |||||||
| Green-veined White | . | 8 | 4 | 18 | . | . | . | . | . | . | . | 14 | 10 | 4 | 28 | 36 | 4 | 6 | 4 | |||||||
| Orange Tip | 4 | 8 | 2 | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | 10 | . | . | . | . | . | . | . | |||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | |||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | |||||||
| Common Blue | . | . | . | . | 2 | 2 | 2 | . | . | 2 | . | . | . | 14 | 12 | 4 | . | . | . | |||||||
| Holly Blue | . | 2 | . | 2 | 2 | 2 | . | . | . | . | . | . | . | 2 | 22 | 10 | . | . | . | |||||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | . | 4 | . | . | . | . | 2 | . | 6 | 2 | 8 | 10 | 26 | 28 | 36 | 40 | 24 | 10 | 2 | |||||||
| Painted Lady | . | . | . | . | . | . | . | 2 | . | . | . | . | . | 2 | 10 | 14 | 2 | . | . | |||||||
| Small Tortoiseshell | 2 | 6 | 2 | 6 | 4 | 4 | . | 6 | 6 | . | 4 | 4 | . | 8 | 58 | 40 | 10 | 12 | . | |||||||
| Peacock | . | . | 2 | 4 | . | . | 2 | . | . | . | . | 2 | . | 16 | 10 | . | . | 2 | . | |||||||
| Comma | . | . | . | . | . | 2 | 2 | . | . | 2 | . | 22 | 6 | 2 | 2 | . | 10 | 10 | 2 | |||||||
| Pearl-bordered Fritillary | . | . | . | 8 | 2 | 6 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 4 | . | 6 | 2 | . | 4 | . | . | . | . | |||||||
| Silver-washed Fritillary | . | . | . | . | . | . | . | . | 2 | . | 6 | 22 | 16 | 2 | 10 | . | 2 | . | . | |||||||
| Speckled Wood | . | 6 | 16 | 22 | 4 | 20 | 22 | 14 | 20 | 10 | 10 | . | 6 | 2 | 24 | 42 | 38 | 16 | 6 | |||||||
| Marbled White | . | . | . | . | . | . | . | . | . | 12 | 10 | 10 | . | 2 | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | 10 | 6 | . | . | 14 | 44 | 28 | 16 | . | . | . | . | |||||||
| Meadow Brown | . | . | . | . | . | . | 2 | 6 | 14 | 66 | 40 | 48 | 44 | 62 | 34 | 24 | 2 | . | . | |||||||
| Ringlet | . | . | . | . | . | . | . | . | . | 48 | 82 | 76 | 34 | 10 | . | . | . | . | . | |||||||