
| 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 | Ind | ||||||||||||||||||||||||||
| Small/Essex Skipper | 86 | . | . | . | . | . | . | . | . | . | 9 | 16 | 20 | 12 | 11 | 1 | . | . | . | . | . | ||||||
| Small Skipper | 86 | . | . | . | . | . | . | . | . | . | 9 | 15 | 19 | 12 | 11 | 1 | . | . | . | . | . | ||||||
| Essex Skipper | 2 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | . | ||||||
| Large Skipper | 19 | . | . | . | . | . | 1 | 2 | 3 | 7 | 5 | . | . | 1 | . | . | . | . | . | . | . | ||||||
| Dingy Skipper | 1 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Clouded Yellow | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Brimstone | 76 | . | 8 | . | 2 | 7 | . | 1 | 2 | . | . | . | 1 | 5 | 4 | . | . | . | 1 | 2 | . | ||||||
| Large White | 100 | . | . | . | 12 | 5 | 3 | 5 | 6 | . | 1 | . | 9 | 15 | 13 | 4 | 2 | . | . | . | . | ||||||
| Small White | 47 | . | . | . | . | . | . | 4 | 3 | . | . | 4 | 9 | 8 | 6 | 2 | 1 | . | . | . | . | ||||||
| Green-veined White | 99 | . | . | . | 8 | 4 | 2 | 2 | 1 | . | . | 5 | 2 | 17 | 9 | 7 | 6 | . | 1 | . | 1 | ||||||
| Orange Tip | 16 | . | . | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Purple Hairstreak | 16 | . | . | . | . | . | . | . | . | 1 | . | 13 | 2 | . | . | . | . | . | . | . | . | ||||||
| White-letter Hairstreak | 3 | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | . | . | . | . | . | ||||||
| Small Copper | 23 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | 11 | 4 | 2 | . | . | . | . | ||||||
| Brown Argus | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Common Blue | 49 | . | . | . | . | . | . | 1 | 2 | . | . | . | . | 2 | 4 | 7 | 11 | 3 | 1 | 2 | . | ||||||
| Holly Blue | 4 | . | . | . | 2 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Duke of Burgundy Fritillary | 2 | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| White Admiral | 19 | . | . | . | . | . | . | . | . | 4 | 3 | 6 | . | . | 3 | . | . | . | . | . | . | ||||||
| Red Admiral | 15 | . | . | . | . | 1 | . | . | . | . | . | . | 3 | 1 | 1 | . | 1 | . | . | 1 | 1 | ||||||
| Painted Lady | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Small Tortoiseshell | 27 | . | 2 | 1 | . | 1 | . | . | . | 2 | 2 | 5 | 1 | 1 | 1 | 1 | . | . | 1 | . | . | ||||||
| Peacock | 135 | 1 | 14 | 10 | 8 | 7 | . | 1 | . | . | . | . | 2 | 17 | 7 | 4 | 1 | . | . | . | 2 | ||||||
| Comma | 30 | . | 1 | . | 1 | . | . | . | 1 | 4 | 2 | 3 | 4 | 1 | 1 | . | . | . | 1 | 1 | . | ||||||
| Silver-washed Fritillary | 157 | . | . | . | . | . | . | . | . | . | 7 | 21 | 39 | 24 | 15 | 9 | 4 | . | . | . | . | ||||||
| Speckled Wood | 210 | . | . | 3 | 4 | 3 | 15 | 16 | 15 | 4 | 4 | 2 | 5 | 9 | 6 | 24 | 23 | 14 | 7 | 4 | 1 | ||||||
| Marbled White | 133 | . | . | . | . | . | . | . | . | 4 | 38 | 45 | 28 | 6 | 6 | . | . | . | . | . | . | ||||||
| Gatekeeper / Hedge Brown | 275 | . | . | . | . | . | . | . | . | . | . | 5 | 27 | 59 | 66 | 20 | 18 | 1 | . | . | . | ||||||
| Meadow Brown | 1069 | . | . | . | . | . | . | 3 | 15 | 186 | 203 | 189 | 171 | 105 | 65 | 1 | 4 | . | . | . | . | ||||||
| Small Heath | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||||||
| Ringlet | 182 | . | . | . | . | . | . | . | . | 15 | 41 | 61 | 30 | 11 | 8 | . | . | . | . | . | . | ||||||