
| 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 | 1 | . | 6 | 11 | 5 | 3 | . | . | . | . | . | |||||
| Essex Skipper | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | |||||
| Large Skipper | 3 | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | |||||
| Brimstone | 4 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | |||||
| Large White | 8 | . | . | 1 | 1 | 1 | . | 1 | . | . | . | . | . | . | 2 | 1 | . | . | . | 1 | . | . | |||||
| Small White | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 2 | . | . | . | . | |||||
| Green-veined White | NI | . | . | . | 5 | . | . | . | . | 2 | . | . | . | 8 | 16 | 11 | 9 | 7 | 10 | 4 | 9 | . | |||||
| Orange Tip | NI | . | 2 | . | 5 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Purple Hairstreak | 10 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 9 | 1 | . | . | . | . | . | |||||
| Small Copper | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | |||||
| Common Blue | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | 1 | . | . | . | |||||
| White Admiral | 2 | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Red Admiral | 4 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | 2 | . | . | . | . | . | . | . | . | |||||
| Small Tortoiseshell | 1 | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Peacock | NI | 3 | 3 | 3 | . | . | . | 1 | . | . | . | . | . | . | . | . | 2 | . | . | . | . | . | |||||
| Comma | 7 | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 2 | . | . | . | . | . | . | 1 | . | |||||
| Silver-washed Fritillary | 52 | . | . | . | . | . | . | . | . | . | . | . | 5 | 13 | 14 | 4 | 2 | . | . | . | . | . | |||||
| Speckled Wood | 89 | . | . | 2 | 3 | 2 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | . | 1 | 3 | 16 | 5 | 9 | 12 | 4 | 2 | |||||
| Marbled White | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | 4 | . | . | . | . | . | |||||
| Meadow Brown | 262 | . | . | . | . | . | . | . | . | . | 3 | 14 | 23 | 55 | 40 | 25 | 22 | 3 | . | . | . | . | |||||
| Ringlet | 49 | . | . | . | . | . | . | . | . | . | . | 1 | 5 | 22 | 10 | 3 | 2 | . | . | . | . | . | |||||