
| 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 | 31 | . | . | . | . | . | . | . | . | . | . | 11 | 1 | 5 | 5 | . | . | . | . | . | |||||||
| Large Skipper | 123 | . | . | . | . | . | . | . | 10 | 7 | 13 | 13 | 10 | 18 | 10 | 9 | . | . | . | . | |||||||
| Dingy Skipper | 90 | . | . | . | . | 21 | 14 | 22 | 3 | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Large White | 66 | . | 1 | . | . | . | 3 | . | . | . | . | 1 | 10 | 16 | 7 | 6 | 2 | 2 | 4 | 5 | |||||||
| Small White | 196 | . | . | 3 | 1 | 6 | 5 | 6 | 3 | . | . | 3 | 8 | 21 | 18 | 33 | 5 | 16 | 18 | 12 | |||||||
| Green-veined White | 16 | . | . | 1 | 1 | . | 3 | 2 | . | . | . | . | . | 1 | 1 | 3 | . | . | . | 1 | |||||||
| Orange Tip | 5 | . | . | . | . | . | 2 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 6 | . | . | . | . | 1 | . | 3 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | . | 1 | |||||||
| Brown Argus | 19 | . | . | . | . | . | 1 | 4 | 2 | . | . | . | . | . | . | . | . | 4 | 3 | 1 | |||||||
| Common Blue | 250 | . | . | . | . | . | 1 | 12 | 33 | 17 | 4 | . | . | 6 | 3 | 30 | 12 | 35 | 13 | 12 | |||||||
| Chalk-hill Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | . | |||||||
| Adonis Blue | 313 | . | . | . | . | . | 2 | 11 | 30 | 6 | 1 | . | . | . | . | 3 | 61 | 62 | 17 | 19 | |||||||
| Holly Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | 1 | . | . | |||||||
| Red Admiral | 9 | . | . | . | . | . | . | . | 1 | 1 | . | . | 1 | . | . | . | . | 1 | . | 2 | |||||||
| Painted Lady | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 2 | . | . | |||||||
| Small Tortoiseshell | 35 | 8 | 6 | 4 | 3 | . | . | . | . | 1 | 3 | 2 | . | . | 1 | . | . | 1 | . | . | |||||||
| Peacock | 28 | 6 | 6 | 6 | 3 | 1 | 1 | . | . | 1 | . | . | . | 2 | 1 | . | . | . | . | . | |||||||
| Comma | 16 | 3 | 2 | 3 | . | . | . | . | . | . | . | . | 2 | 1 | 1 | 1 | . | . | . | 1 | |||||||
| Speckled Wood | 82 | . | . | 1 | 1 | 4 | 7 | 1 | 5 | 4 | 3 | . | 3 | 7 | 7 | 8 | 6 | 4 | 2 | 1 | |||||||
| Wall Brown | 47 | . | . | . | . | . | 7 | 10 | 2 | . | . | . | . | 1 | 4 | 10 | . | . | . | . | |||||||
| Marbled White | 292 | . | . | . | . | . | . | . | . | . | 9 | 84 | 38 | 33 | 16 | 9 | . | . | . | . | |||||||
| Gatekeeper / Hedge Brown | 180 | . | . | . | . | . | . | . | . | . | . | . | 18 | 49 | 47 | 44 | 3 | . | . | . | |||||||
| Meadow Brown | 355 | . | . | . | . | . | . | . | . | . | 5 | 40 | 37 | 58 | 37 | 51 | 20 | 5 | 7 | 3 | |||||||
| Small Heath | 390 | . | . | . | . | 14 | 23 | 31 | 41 | 31 | 21 | 8 | 4 | 1 | 7 | 16 | 21 | 21 | 11 | 19 | |||||||
| Ringlet | 18 | . | . | . | . | . | . | . | . | . | 1 | 4 | 4 | 1 | 2 | . | . | . | . | . | |||||||