
| 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/Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 12 | . | . | . | . | . | ||||||
| Small Skipper | . | . | . | . | . | . | . | . | . | . | . | 2 | 4 | 8 | . | . | . | . | . | . | ||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 1 | . | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | 2 | 3 | 24 | 13 | 12 | 12 | 15 | 3 | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Brimstone | 8 | 8 | . | . | . | . | . | . | . | . | . | . | 5 | 4 | 3 | . | 3 | 4 | . | . | ||||||
| Large White | . | . | . | 2 | . | 4 | . | . | . | 1 | 5 | 12 | 14 | 18 | 29 | 28 | 20 | 14 | 15 | 1 | ||||||
| Small White | 1 | . | . | 3 | . | . | . | . | . | . | 1 | 2 | 35 | 43 | 15 | 8 | 69 | 45 | 54 | 11 | ||||||
| Green-veined White | . | 2 | 6 | 5 | 6 | 3 | 3 | . | . | 9 | 34 | 73 | 166 | 134 | 50 | 44 | 236 | 13 | 23 | 10 | ||||||
| Orange Tip | . | . | 4 | 4 | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||||
| Brown Argus | . | . | . | . | . | . | . | . | . | . | . | . | . | 5 | 6 | 2 | 3 | . | . | . | ||||||
| Common Blue | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 1 | 4 | 1 | 1 | . | . | . | ||||||
| Holly Blue | . | 1 | . | . | . | 1 | . | . | . | . | . | 1 | 3 | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | 1 | 5 | 3 | . | 2 | 1 | . | 1 | . | . | 1 | . | . | 4 | 3 | ||||||
| Painted Lady | . | . | . | . | . | . | 3 | . | . | . | . | . | . | . | 5 | 6 | 6 | 1 | . | 1 | ||||||
| Small Tortoiseshell | . | 1 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | ||||||
| Peacock | 18 | 8 | 2 | . | 1 | . | . | . | . | . | . | 3 | 17 | 33 | 30 | 9 | . | 2 | . | . | ||||||
| Comma | 5 | . | . | . | . | 1 | . | . | . | 1 | 1 | . | . | 1 | 1 | 1 | 1 | 5 | 3 | 12 | ||||||
| Speckled Wood | . | 1 | 4 | 2 | 8 | 13 | 18 | 15 | 7 | 5 | 1 | 2 | 2 | 2 | 2 | 6 | 13 | 18 | 11 | 10 | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 7 | 12 | 40 | 43 | 10 | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | 1 | 5 | 9 | 22 | 41 | 39 | 40 | 70 | 33 | 28 | 9 | 1 | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | 6 | 57 | 92 | 58 | 31 | 15 | 12 | . | . | . | . | . | . | ||||||