
| 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 | . | . | . | . | . | . | . | . | . | 3 | 8 | 11 | 31 | 19 | 3 | . | . | . | . | |||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||||
| Large Skipper | . | . | . | . | . | 3 | 13 | . | 5 | 45 | 48 | 11 | 10 | 4 | 1 | . | . | . | . | |||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | |||||||
| Brimstone | . | 4 | . | . | . | . | . | . | . | . | . | . | 1 | 2 | . | 2 | 2 | 3 | 2 | |||||||
| Large White | . | 3 | 1 | 3 | 2 | 2 | . | . | . | 3 | 4 | 1 | 3 | 5 | 1 | 2 | 5 | 4 | 1 | |||||||
| Small White | . | . | . | . | . | . | . | . | . | 3 | 9 | 4 | 8 | 9 | 1 | . | 1 | 6 | . | |||||||
| Green-veined White | 2 | 7 | 4 | . | 3 | 2 | . | . | . | 13 | 8 | 10 | 10 | 19 | 7 | 7 | 2 | 7 | 5 | |||||||
| Orange Tip | . | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brown Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | |||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | |||||||
| Common Blue | . | . | . | 1 | 2 | 8 | . | . | . | . | . | . | . | 1 | 1 | 10 | 12 | 2 | . | |||||||
| White Admiral | . | . | . | . | . | . | . | . | . | 6 | 2 | 2 | . | 1 | . | . | . | . | . | |||||||
| Red Admiral | . | . | . | . | . | 2 | 2 | . | . | . | . | 2 | . | . | . | 4 | 22 | 30 | 26 | |||||||
| Painted Lady | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 3 | 1 | 1 | |||||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | 4 | . | . | 1 | |||||||
| Peacock | 6 | 20 | . | . | . | 2 | . | . | . | . | . | . | 6 | 7 | . | 2 | 4 | . | . | |||||||
| Comma | . | 1 | . | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | 2 | 2 | . | 2 | |||||||
| Speckled Wood | 2 | 20 | 8 | 1 | 15 | 13 | 15 | . | 6 | 4 | 5 | 10 | 25 | 55 | 59 | 44 | 50 | 51 | 42 | |||||||
| Marbled White | . | . | . | . | . | . | . | . | 5 | 27 | 34 | 15 | 2 | . | . | . | . | . | . | |||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 9 | 9 | 17 | 47 | 56 | 18 | . | . | . | . | |||||||
| Meadow Brown | . | . | . | . | . | . | 3 | . | 35 | 50 | 29 | 28 | 40 | 43 | 31 | 7 | 9 | 4 | 1 | |||||||
| Ringlet | . | . | . | . | . | . | 1 | . | 174 | 342 | 260 | 171 | 49 | 27 | 1 | . | . | . | . | |||||||