
| 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 | . | . | . | 2 | 4 | 3 | 16 | 62 | 39 | 7 | . | . | . | . | . | . | |||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | 3 | . | . | . | . | . | . | |||||
| Large Skipper | 12 | . | . | . | . | . | . | 3 | 1 | . | . | 7 | 1 | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 5 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Large White | 39 | . | . | . | . | . | 1 | 1 | . | . | 2 | . | 2 | 2 | 9 | 12 | 3 | . | . | 3 | . | . | |||||
| Small White | 188 | 2 | . | . | 2 | . | 1 | 2 | . | . | 1 | 2 | 4 | 17 | 47 | 36 | 15 | 12 | 13 | 4 | 2 | 3 | |||||
| Green-veined White | 11 | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | 4 | 2 | . | . | . | . | . | |||||
| Orange Tip | 41 | 6 | 9 | 10 | 1 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||
| Small Copper | 6 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | |||||
| Common Blue | 77 | . | . | . | 3 | . | 3 | 1 | . | 1 | . | . | . | 5 | 3 | 14 | 20 | 6 | 2 | 1 | . | . | |||||
| Holly Blue | 53 | 2 | 3 | 4 | 2 | 3 | 1 | . | . | . | . | . | 2 | 7 | 2 | 6 | 6 | 4 | . | . | . | . | |||||
| Red Admiral | 63 | . | . | . | . | 1 | . | 4 | 2 | 1 | . | 2 | 7 | 1 | 2 | . | 11 | 11 | 3 | 1 | 4 | . | |||||
| Painted Lady | 3 | . | . | . | . | . | . | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 24 | . | 1 | . | . | . | . | . | 2 | . | 1 | 1 | 1 | . | . | . | 4 | 2 | 4 | 1 | . | . | |||||
| Peacock | 29 | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | 9 | 6 | 6 | 1 | . | . | . | . | |||||
| Comma | 12 | . | . | . | . | . | . | . | . | . | 1 | . | 2 | 3 | . | . | . | . | 2 | 1 | . | 1 | |||||
| Silver-washed Fritillary | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Speckled Wood | 85 | . | . | . | 2 | . | 2 | . | 1 | . | 2 | . | . | . | 10 | 19 | 17 | 4 | 5 | 2 | 2 | 3 | |||||
| Wall Brown | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | 329 | . | . | . | . | . | . | . | . | . | . | . | 1 | 34 | 99 | 130 | 39 | 3 | 1 | . | . | . | |||||
| Meadow Brown | 337 | . | . | . | . | . | . | 1 | 4 | 10 | 40 | 72 | 77 | 62 | 50 | 18 | 1 | 1 | . | . | . | . | |||||
| Small Heath | 16 | . | . | . | . | . | 2 | 2 | 2 | . | . | . | . | . | . | 2 | 1 | 1 | 1 | 1 | . | . | |||||