
| 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 | . | . | . | . | . | . | . | . | 1 | 5 | 6 | 10 | 2 | 3 | . | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | 2 | 10 | 25 | 8 | 19 | 18 | 7 | 3 | 2 | 1 | . | . | . | . | ||||||
| Dingy Skipper | . | . | . | 9 | 28 | 44 | 15 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | . | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | 2 | . | 3 | 1 | . | 1 | ||||||
| Brimstone | 1 | 1 | 1 | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Large White | . | 1 | . | 6 | 9 | 6 | 3 | . | . | 4 | 4 | 7 | 18 | 10 | 9 | 21 | 1 | . | . | . | ||||||
| Small White | 2 | 4 | . | 6 | 6 | 6 | 1 | . | . | . | 9 | 17 | 2 | 2 | 6 | 7 | 2 | . | . | . | ||||||
| Green-veined White | . | 3 | 1 | 10 | 9 | 1 | . | . | 2 | 3 | 15 | 22 | 12 | 11 | 5 | 8 | 2 | . | . | . | ||||||
| Orange Tip | . | 2 | . | 5 | 3 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | 1 | ||||||
| Brown Argus | . | . | . | . | . | . | 6 | . | . | . | . | . | 1 | 1 | 2 | 4 | 7 | 1 | 5 | 4 | ||||||
| Common Blue | . | . | . | . | . | 6 | 16 | 1 | 3 | 5 | . | . | 2 | 8 | 22 | 61 | 38 | 11 | 22 | 11 | ||||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | 1 | . | 1 | . | ||||||
| Adonis Blue | . | . | . | . | . | 11 | 30 | . | . | 1 | . | . | . | . | 3 | 10 | 69 | 6 | 26 | 2 | ||||||
| Holly Blue | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | . | 1 | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | 1 | . | . | 1 | 1 | . | 1 | . | 1 | . | . | . | . | . | ||||||
| Painted Lady | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | 3 | 1 | . | . | . | . | ||||||
| Small Tortoiseshell | 4 | 6 | 3 | . | 3 | . | . | . | . | . | 2 | 1 | . | 1 | . | . | . | . | . | . | ||||||
| Peacock | 5 | 5 | 3 | 4 | 5 | . | . | . | . | . | . | . | 4 | 5 | 4 | . | . | . | . | . | ||||||
| Comma | . | 2 | 1 | 5 | . | . | 1 | . | . | 1 | 2 | 4 | 5 | 4 | 1 | . | . | . | . | . | ||||||
| Speckled Wood | 1 | 3 | 3 | 3 | 2 | 2 | 8 | 2 | . | . | 1 | 7 | 16 | 13 | 26 | 14 | 7 | 1 | 1 | . | ||||||
| Wall Brown | . | . | . | 3 | 11 | 10 | 1 | . | . | . | . | . | 16 | 31 | 29 | 51 | . | . | . | . | ||||||
| Marbled White | . | . | . | . | . | . | . | 4 | 54 | 93 | 118 | 61 | 6 | 2 | 2 | . | . | . | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 1 | 6 | 45 | 33 | 43 | 19 | 14 | . | . | . | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 5 | 37 | 37 | 96 | 113 | 95 | 112 | 75 | 61 | 18 | 1 | 4 | . | ||||||
| Small Heath | . | . | . | 5 | 35 | 34 | 28 | 7 | 13 | 12 | 9 | 4 | . | 5 | 5 | 11 | 14 | 1 | 3 | 3 | ||||||
| Ringlet | . | . | . | . | . | . | . | . | 4 | 10 | 42 | 16 | 1 | . | . | . | . | . | . | . | ||||||