
| 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 | 6 | . | . | . | . | . | . | . | . | . | 1 | . | . | 2 | 3 | . | . | . | . | . | . | . | . | ||||
| Large Skipper | 7 | . | . | . | . | . | . | . | . | 2 | . | . | 2 | . | 1 | . | . | . | . | . | . | . | . | ||||
| Brimstone | 45 | 7 | 1 | . | 9 | 7 | . | 6 | 1 | . | . | . | . | . | 1 | . | . | 6 | . | . | 1 | . | . | ||||
| Large White | 9 | . | . | . | . | . | . | 2 | . | . | . | . | 1 | . | 2 | . | . | 2 | 1 | . | . | . | . | ||||
| Small White | 3 | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | ||||
| Green-veined White | 141 | . | . | . | 7 | 11 | 2 | 4 | . | . | . | 1 | 12 | 14 | 16 | 31 | 10 | 9 | 2 | . | 1 | . | . | ||||
| Orange Tip | 28 | 1 | . | . | 10 | 8 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | ||||
| Small Copper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | ||||
| Holly Blue | NI | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| White Admiral | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | ||||
| Red Admiral | 8 | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | 2 | 1 | . | 1 | ||||
| Painted Lady | 3 | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | 1 | . | 1 | . | . | . | ||||
| Small Tortoiseshell | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 1 | . | ||||
| Peacock | 43 | 6 | 3 | 2 | 8 | 5 | . | 3 | . | . | . | . | . | 3 | 4 | 2 | 1 | 2 | . | . | 1 | . | . | ||||
| Comma | 9 | 1 | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | . | . | . | . | 1 | 1 | ||||
| Small Pearl-bordered Fritillary | 12 | . | . | . | . | . | . | 4 | 3 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Pearl-bordered Fritillary | NI | . | . | . | 8 | 9 | 4 | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||
| Silver-washed Fritillary | 105 | . | . | . | . | . | . | . | . | . | 1 | 6 | 24 | 16 | 13 | 7 | 2 | 2 | 1 | 3 | . | . | . | ||||
| Speckled Wood | 41 | . | . | . | 2 | 2 | . | . | 2 | . | 1 | 2 | . | . | . | 4 | . | 4 | 2 | 6 | 5 | 5 | 2 | ||||
| Gatekeeper / Hedge Brown | 35 | . | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 10 | 6 | 4 | 7 | 6 | 1 | . | . | . | ||||
| Meadow Brown | 126 | . | . | . | . | . | . | . | . | 2 | 4 | 1 | 18 | 17 | 29 | 16 | 5 | 8 | 8 | 3 | . | . | . | ||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | 8 | 10 | 24 | 8 | 4 | 2 | . | . | . | . | . | . | . | ||||