
| 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 | NI | . | . | . | . | . | . | . | . | 3 | 38 | 36 | 20 | 8 | 4 | . | . | . | . | . | |||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | . | |||||||
| Silver-spotted Skipper | 39 | . | . | . | . | . | . | . | . | . | . | . | . | . | 18 | 4 | 3 | 2 | 1 | . | |||||||
| Large Skipper | 16 | . | . | . | . | . | . | . | . | 1 | . | 6 | 5 | 3 | . | . | . | . | . | . | |||||||
| Dingy Skipper | 22 | . | . | . | 4 | 15 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | 5 | . | . | . | . | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | 76 | 1 | 8 | 8 | 12 | 6 | 6 | 2 | . | . | . | 2 | 4 | 7 | . | 9 | . | . | . | . | |||||||
| Large White | 33 | . | . | . | . | 1 | 1 | 1 | . | . | 3 | 6 | 3 | 15 | 1 | . | . | . | . | . | |||||||
| Small White | 109 | . | . | . | 4 | 1 | . | 2 | . | 1 | 4 | 1 | 25 | 8 | 15 | 9 | 10 | 8 | 2 | 1 | |||||||
| Green-veined White | 25 | . | 1 | 2 | . | 2 | . | . | . | . | . | 5 | 1 | 7 | . | 3 | 1 | . | . | . | |||||||
| Orange Tip | 9 | . | 1 | 2 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 4 | . | . | . | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 52 | . | . | 1 | 4 | 2 | . | . | . | . | 2 | 1 | 1 | 5 | 7 | 3 | 1 | 1 | 9 | 3 | |||||||
| Brown Argus | 118 | . | . | . | 4 | 11 | 12 | 9 | . | 1 | . | . | 2 | 22 | 17 | 10 | 3 | . | 4 | . | |||||||
| Common Blue | NI | . | . | . | . | 9 | 17 | 12 | 3 | 3 | 2 | . | 7 | 28 | 42 | 33 | 13 | 7 | 3 | . | |||||||
| Chalk-hill Blue | 35 | . | . | . | . | . | . | . | . | . | . | 1 | 9 | 14 | 6 | . | 1 | . | 1 | . | |||||||
| Holly Blue | 46 | . | . | 4 | 8 | 1 | . | . | . | . | 1 | . | 4 | 24 | 1 | . | . | . | . | . | |||||||
| Red Admiral | 5 | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | |||||||
| Small Tortoiseshell | 11 | . | . | . | . | . | . | . | 1 | . | 1 | 1 | . | . | 1 | 1 | . | . | 1 | 1 | |||||||
| Peacock | NI | 1 | 8 | 1 | . | . | . | . | 1 | . | . | . | 2 | 1 | . | . | 1 | . | . | . | |||||||
| Comma | 5 | . | 1 | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | |||||||
| Dark Green Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||||
| Speckled Wood | 93 | . | 4 | 4 | 6 | . | . | . | 4 | 4 | 3 | 1 | 1 | 18 | 5 | 8 | 8 | 7 | 2 | 1 | |||||||
| Wall Brown | 15 | . | . | . | . | . | . | . | . | . | . | . | . | 7 | 5 | . | . | . | . | . | |||||||
| Marbled White | 93 | . | . | . | . | . | . | . | . | 8 | 30 | 26 | 8 | 2 | . | . | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 41 | . | . | . | . | . | . | . | . | . | . | 5 | 5 | 19 | 8 | . | . | . | . | . | |||||||
| Meadow Brown | 312 | . | . | . | . | . | . | . | 1 | 18 | 14 | 31 | 31 | 54 | 44 | 39 | 9 | 9 | 2 | . | |||||||
| Small Heath | 281 | . | . | . | 1 | 4 | 7 | 11 | 22 | 41 | 51 | 17 | 5 | 5 | 5 | 7 | 8 | 6 | 13 | 1 | |||||||
| Ringlet | 52 | . | . | . | . | . | . | . | . | 1 | 11 | 6 | 13 | 9 | 2 | . | 3 | . | . | . | |||||||