
| 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 | 44 | . | . | . | . | . | . | . | . | . | . | . | 4 | 9 | 15 | 9 | 1 | 4 | 2 | . | . | . | . | . | . | ||
| Small Skipper | 44 | . | . | . | . | . | . | . | . | . | . | . | 3 | 7 | 11 | 7 | 1 | 4 | 2 | . | . | . | . | . | . | ||
| Essex Skipper | 8 | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 4 | 2 | . | . | . | . | . | . | . | . | . | ||
| Large Skipper | 19 | . | . | . | . | . | . | . | . | . | . | 2 | 5 | 6 | 3 | . | . | . | . | . | . | . | . | . | . | ||
| Grizzled Skipper | 4 | . | . | . | . | . | . | 1 | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| Brimstone | 31 | . | . | 3 | 2 | 2 | 2 | 7 | 3 | . | 1 | . | 1 | . | . | . | 1 | 2 | 2 | 3 | . | . | . | . | 1 | ||
| Large White | 91 | . | . | . | . | 2 | 8 | 3 | 5 | 13 | 7 | 4 | 4 | 3 | 9 | 6 | 6 | 5 | 5 | 2 | 1 | 1 | 2 | . | . | ||
| Small White | 44 | . | . | . | . | 2 | 8 | 3 | . | . | 2 | . | 1 | 7 | 7 | 3 | . | . | 2 | 3 | 2 | 2 | . | . | . | ||
| Green-veined White | 135 | 1 | . | 1 | . | . | 1 | 5 | 14 | 11 | 3 | 4 | 6 | 7 | 4 | 19 | 26 | 7 | 12 | 2 | 4 | 1 | 2 | 1 | . | ||
| Orange Tip | 21 | . | . | . | 1 | 3 | 5 | 4 | 2 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| White-letter Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||
| Brown Argus | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||
| Common Blue | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | ||
| Holly Blue | 10 | . | . | . | . | . | . | 1 | 2 | 1 | 2 | . | . | . | 1 | 1 | . | . | . | 1 | . | . | . | . | . | ||
| Duke of Burgundy Fritillary | 4 | . | . | . | . | . | . | 2 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||
| White Admiral | 7 | . | . | . | . | . | . | . | . | . | . | . | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | ||
| Red Admiral | 11 | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | 1 | 1 | 2 | . | . | . | 4 | 1 | . | . | . | ||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | ||
| Small Tortoiseshell | 9 | . | . | 1 | 1 | . | 2 | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | 1 | . | . | . | 1 | ||
| Peacock | 85 | 3 | 4 | 6 | 5 | 6 | 9 | 5 | 5 | 5 | 1 | . | . | . | . | 1 | 17 | 10 | 6 | 1 | 1 | . | . | . | . | ||
| Comma | 12 | 1 | 1 | . | 1 | . | . | . | . | 1 | . | . | 1 | 2 | 1 | 1 | 1 | . | . | . | . | . | . | 1 | 1 | ||
| Dark Green Fritillary | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | ||
| Silver-washed Fritillary | 36 | . | . | . | . | . | . | . | . | . | . | . | 4 | 6 | 7 | 10 | 3 | 2 | 2 | 2 | . | . | . | . | . | ||
| Speckled Wood | 250 | 1 | . | 2 | 4 | 3 | . | . | 11 | 23 | 17 | 8 | . | . | . | 11 | 18 | 24 | 38 | 29 | 29 | 8 | 9 | 2 | 1 | ||
| Marbled White | 108 | . | . | . | . | . | . | . | . | . | . | . | 23 | 31 | 37 | 12 | 1 | . | . | . | . | . | . | . | . | ||
| Gatekeeper / Hedge Brown | 164 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 34 | 61 | 35 | 22 | 8 | 1 | . | . | . | . | ||
| Meadow Brown | 175 | . | . | . | . | . | . | . | . | . | . | 8 | 36 | 13 | 30 | 24 | 23 | 6 | 6 | 1 | . | . | . | . | . | ||
| Ringlet | 188 | . | . | . | . | . | . | . | . | . | . | . | 62 | 51 | 44 | 12 | 5 | . | . | . | . | . | . | . | . | ||