
| 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 Skipper | 200 | . | . | . | . | . | . | . | . | 16 | 58 | 79 | 18 | 27 | . | . | . | . | . | . | |||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||||
| Silver-spotted Skipper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||
| Large Skipper | 5 | . | . | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | 101 | . | 5 | 17 | 21 | 15 | 15 | 8 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | 17 | . | 1 | 2 | 4 | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | 35 | 5 | 5 | 12 | 2 | 1 | . | 1 | . | . | . | 2 | 1 | 2 | . | . | 2 | . | . | . | |||||||
| Large White | 7 | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 1 | 1 | 1 | . | . | . | |||||||
| Small White | 30 | . | . | . | . | 1 | 1 | . | . | . | 4 | . | 1 | 2 | 3 | 1 | 4 | 5 | 2 | 3 | |||||||
| Green-veined White | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Orange Tip | 23 | 1 | 6 | 6 | 10 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 25 | . | . | 5 | 12 | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Purple Hairstreak | NI | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Blue | 72 | . | . | . | 1 | 13 | 5 | 24 | 5 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brown Argus | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | |||||||
| Common Blue | 122 | . | . | . | . | 18 | 8 | 18 | 10 | 4 | 7 | . | . | 5 | 5 | 2 | 3 | 12 | 6 | 7 | |||||||
| Chalk-hill Blue | 122 | . | . | . | . | . | . | . | . | . | 4 | 8 | 9 | 29 | 17 | 11 | 15 | 12 | 8 | 6 | |||||||
| Adonis Blue | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Holly Blue | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Duke of Burgundy Fritillary | 13 | . | 1 | 2 | 5 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | 8 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | 2 | 1 | 2 | |||||||
| Small Tortoiseshell | 11 | 1 | 2 | . | 1 | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | 2 | |||||||
| Peacock | 21 | 3 | 4 | 3 | 3 | . | . | . | . | . | . | . | 1 | 5 | . | . | . | . | . | 1 | |||||||
| Comma | 4 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | . | . | . | . | 1 | |||||||
| Dark Green Fritillary | 35 | . | . | . | . | . | . | . | . | . | 7 | 9 | 6 | 11 | 1 | 1 | . | . | . | . | |||||||
| Silver-washed Fritillary | NI | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | 12 | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | |||||||
| Marbled White | 692 | . | . | . | . | . | . | . | 96 | 110 | 252 | 160 | 10 | 14 | 2 | . | . | . | . | . | |||||||
| Grayling | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 338 | . | . | . | . | . | . | . | . | 1 | 59 | 168 | 34 | 56 | 7 | 1 | 12 | . | . | . | |||||||
| Meadow Brown | 539 | . | . | . | . | . | . | . | 93 | 36 | 102 | 128 | 24 | 47 | 16 | 11 | 17 | 6 | 8 | 3 | |||||||
| Small Heath | 462 | . | . | 5 | 22 | 38 | 37 | 49 | 29 | 17 | 13 | 5 | 2 | 1 | 17 | 6 | 29 | 33 | 38 | 26 | |||||||
| Ringlet | 280 | . | . | . | . | . | . | . | 42 | 68 | 121 | 20 | 6 | . | . | . | . | . | . | . | |||||||