
| 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 | . | . | . | . | . | . | . | 2 | 14 | 17 | 13 | 7 | 11 | 1 | 2 | . | . | . | ||||||||
| Large Skipper | 81 | . | . | . | . | . | 1 | 7 | 10 | 16 | 15 | 10 | 4 | 1 | . | . | 1 | . | . | ||||||||
| Dingy Skipper | 4 | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Clouded Yellow | 27 | . | . | . | . | . | 2 | 2 | 2 | . | . | . | 1 | 1 | . | 4 | 9 | 3 | 3 | ||||||||
| Brimstone | 10 | 1 | . | . | . | . | . | . | . | 1 | . | . | 1 | 3 | 1 | 1 | . | . | . | ||||||||
| Large White | 23 | . | 1 | 1 | 2 | 2 | 2 | . | . | . | 1 | 3 | 1 | 4 | 1 | 2 | . | . | . | ||||||||
| Small White | 5 | . | . | . | . | . | 1 | . | . | . | . | . | . | 2 | . | . | 1 | 1 | . | ||||||||
| Green-veined White | 58 | . | 4 | 2 | 4 | 4 | 1 | . | . | 3 | 9 | 5 | 7 | 2 | 1 | 2 | . | . | . | ||||||||
| Orange Tip | 9 | . | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||||
| Purple Hairstreak | 5 | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | . | 1 | . | . | . | ||||||||
| Small Copper | 21 | . | . | 1 | 1 | 4 | 1 | . | . | . | . | . | 1 | 1 | 2 | 6 | 1 | 1 | 1 | ||||||||
| Common Blue | 100 | . | . | . | 2 | 7 | 14 | 10 | 4 | . | 1 | . | 2 | 5 | 3 | 16 | 23 | 7 | 5 | ||||||||
| Holly Blue | NI | 1 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | ||||||||
| White Admiral | 2 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||||||
| Red Admiral | 16 | . | . | 4 | . | . | 1 | 6 | . | . | . | . | . | . | . | . | . | 1 | . | ||||||||
| Painted Lady | 18 | . | . | . | . | . | 1 | 2 | . | 1 | . | 1 | . | 1 | . | 7 | 1 | 1 | 3 | ||||||||
| Small Tortoiseshell | 2 | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | ||||||||
| Peacock | 8 | . | . | . | 1 | . | . | . | . | . | . | . | 3 | 1 | 2 | . | . | . | . | ||||||||
| Comma | 2 | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | 1 | . | . | ||||||||
| Silver-washed Fritillary | 9 | . | . | . | . | . | . | . | . | 2 | 2 | . | 1 | 1 | . | 1 | . | . | . | ||||||||
| Speckled Wood | 42 | . | 3 | . | 1 | 3 | 2 | 2 | 1 | . | 1 | 1 | 2 | . | 6 | 4 | 2 | 8 | 2 | ||||||||
| Gatekeeper / Hedge Brown | 111 | . | . | . | . | . | . | . | . | 8 | 15 | 25 | 21 | 24 | 5 | . | 1 | . | . | ||||||||
| Meadow Brown | 479 | . | . | . | . | . | . | 12 | 31 | 55 | 44 | 62 | 61 | 77 | 53 | 25 | 9 | . | . | ||||||||
| Ringlet | 9 | . | . | . | . | . | 1 | . | . | 2 | 3 | . | . | . | . | . | . | . | . | ||||||||