
| 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 | . | . | . | . | . | . | . | . | 1 | 5 | 9 | 31 | 22 | 11 | 6 | . | . | . | ||||||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | 3 | 2 | 1 | . | . | . | . | . | . | ||||||||
| Silver-spotted Skipper | 19 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | 4 | 2 | 4 | 1 | ||||||||
| Large Skipper | 31 | . | . | . | . | . | . | . | 1 | 2 | 6 | 18 | 1 | 1 | . | . | . | . | . | ||||||||
| Dingy Skipper | NI | . | . | . | 1 | 3 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Grizzled Skipper | NI | . | . | . | . | 8 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Brimstone | 114 | 7 | 2 | 4 | 16 | 4 | 3 | . | 4 | . | . | . | . | . | 16 | 19 | 1 | 5 | 2 | ||||||||
| Large White | 38 | . | . | . | . | . | 1 | 2 | . | . | . | 2 | 2 | 12 | 2 | 5 | 1 | 1 | . | ||||||||
| Small White | 56 | . | 1 | . | . | . | . | 2 | . | . | . | 1 | 3 | 3 | 22 | 5 | 2 | 2 | . | ||||||||
| Green-veined White | 41 | . | 1 | 1 | 2 | 7 | 4 | 2 | . | . | . | . | . | 1 | 3 | 5 | . | . | . | ||||||||
| Orange Tip | NI | . | . | . | 3 | 3 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Green Hairstreak | NI | . | . | . | 1 | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Small Copper | NI | . | . | . | . | 1 | 1 | . | . | . | . | 1 | 2 | 4 | 5 | 3 | . | . | . | ||||||||
| Brown Argus | 20 | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | 1 | 1 | 1 | 5 | 2 | ||||||||
| Common Blue | 66 | . | . | . | . | . | 5 | 9 | 6 | 7 | 1 | . | . | . | 1 | 4 | 1 | 10 | 3 | ||||||||
| Chalk-hill Blue | 69 | . | . | . | . | . | . | . | . | . | . | 1 | 7 | 14 | 14 | 10 | 4 | 2 | 1 | ||||||||
| Holly Blue | NI | . | . | 2 | . | . | . | 1 | . | . | . | . | . | . | 1 | 1 | . | . | . | ||||||||
| Red Admiral | 6 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | 1 | ||||||||
| Painted Lady | 3 | . | . | . | . | . | . | . | 1 | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| Small Tortoiseshell | 39 | 1 | 2 | . | . | . | . | . | . | . | . | . | 5 | 6 | 8 | 1 | . | 1 | 4 | ||||||||
| Peacock | 43 | . | 2 | 1 | 2 | . | . | . | . | . | . | . | . | . | 17 | 6 | 1 | 1 | . | ||||||||
| Dark Green Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | ||||||||
| Speckled Wood | 44 | . | . | 4 | 4 | 6 | . | . | 4 | 1 | 3 | 3 | . | 1 | . | 3 | . | . | 1 | ||||||||
| Wall Brown | 2 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Marbled White | 79 | . | . | . | . | . | . | . | . | 17 | 21 | 28 | 11 | 1 | . | . | . | . | . | ||||||||
| Gatekeeper / Hedge Brown | 78 | . | . | . | . | . | . | . | . | . | 1 | 17 | 17 | 20 | 6 | 3 | . | 1 | . | ||||||||
| Meadow Brown | 485 | . | . | . | . | . | . | . | 6 | 26 | 31 | 47 | 38 | 34 | 56 | 53 | 26 | 57 | 23 | ||||||||
| Small Heath | 115 | . | . | . | . | . | 2 | 7 | 8 | 28 | 16 | 19 | 10 | 4 | 1 | . | . | 4 | 1 | ||||||||
| Ringlet | 36 | . | . | . | . | . | . | . | . | 5 | 12 | 13 | 3 | 2 | . | . | . | . | . | ||||||||