
| 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 | NI | . | . | . | . | . | . | . | . | 9 | 7 | 6 | 8 | 2 | . | . | . | . | . | . | |||||||
| Silver-spotted Skipper | 15 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 4 | 4 | 1 | . | . | |||||||
| Large Skipper | 11 | . | . | . | 1 | . | . | . | . | 7 | . | 1 | 2 | . | . | . | . | . | . | . | |||||||
| Dingy Skipper | 10 | . | . | 3 | 2 | 3 | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||
| Grizzled Skipper | NI | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Brimstone | 3 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 1 | . | . | . | . | . | |||||||
| Large White | 16 | . | . | . | . | 1 | 1 | 2 | . | . | . | 7 | 5 | 3 | . | . | . | . | . | . | |||||||
| Small White | 11 | . | . | . | . | . | 1 | 1 | . | 1 | . | . | 2 | . | . | 1 | 2 | 1 | . | . | |||||||
| Green-veined White | 1 | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Green Hairstreak | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||
| Small Copper | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | . | . | |||||||
| Brown Argus | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | |||||||
| Common Blue | 77 | . | . | . | 1 | 1 | 1 | . | 1 | . | . | 7 | 12 | 11 | 12 | 7 | 8 | 12 | 3 | 1 | |||||||
| Chalk-hill Blue | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | . | |||||||
| Holly Blue | 6 | . | 1 | . | . | . | . | . | . | . | . | 5 | . | . | . | . | . | . | . | . | |||||||
| Red Admiral | 5 | . | . | . | . | . | . | . | . | . | . | . | 5 | . | . | . | . | . | . | . | |||||||
| Painted Lady | 1 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||||
| Small Tortoiseshell | 12 | . | . | . | . | . | . | . | . | 2 | 1 | 2 | . | 1 | . | . | . | 5 | 1 | . | |||||||
| Peacock | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | |||||||
| Silver-washed Fritillary | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | |||||||
| Speckled Wood | 15 | . | 1 | 1 | 1 | . | . | . | . | . | . | 2 | . | . | 1 | 3 | 4 | 1 | . | 1 | |||||||
| Marbled White | 22 | . | . | . | . | . | . | . | . | 19 | 1 | 2 | . | . | . | . | . | . | . | . | |||||||
| Meadow Brown | 177 | . | . | . | . | . | . | . | 6 | 34 | 11 | 17 | 12 | 20 | 28 | 16 | 12 | 16 | 4 | 1 | |||||||
| Small Heath | 162 | . | . | 1 | 10 | 4 | 7 | 4 | 9 | 10 | . | 1 | . | 16 | 18 | 8 | 20 | 23 | 22 | 9 | |||||||
| Ringlet | 28 | . | . | . | . | . | . | . | . | 21 | 4 | 1 | 2 | . | . | . | . | . | . | . | |||||||
| Five-spot Burnet | NI | . | . | . | . | 9 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||||