
| 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 | ||||||||||||||||||||||||||
| Small Skipper | . | . | . | . | . | . | . | . | . | . | 30 | 3 | 30 | 23 | . | 9 | . | . | . | . | ||||||
| Essex Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 7 | . | . | . | . | . | ||||||
| Large Skipper | . | . | . | . | . | . | . | 2 | 3 | 5 | 4 | . | 3 | 4 | 1 | . | . | . | . | . | ||||||
| Brimstone | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Large White | . | . | . | 3 | . | . | 1 | . | . | 1 | 6 | 3 | 15 | 19 | 9 | 6 | . | . | 2 | . | ||||||
| Small White | . | . | . | . | . | 1 | . | . | . | . | 3 | 11 | 5 | 2 | 2 | . | 1 | . | . | . | ||||||
| Green-veined White | 2 | 6 | 6 | 2 | 2 | 1 | 1 | . | . | 1 | . | 1 | 10 | 4 | 7 | 4 | 4 | 3 | 4 | . | ||||||
| Orange Tip | . | 2 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Green Hairstreak | . | . | . | . | . | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Common Blue | . | . | . | . | . | . | . | 2 | 1 | 2 | 1 | . | . | 2 | 1 | 5 | 11 | 4 | 6 | . | ||||||
| Holly Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Red Admiral | . | . | . | . | . | . | . | 2 | . | . | 3 | . | 2 | 2 | 1 | . | . | . | 2 | . | ||||||
| Small Tortoiseshell | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | ||||||
| Peacock | 12 | 6 | 1 | 2 | . | . | . | . | . | . | . | . | 10 | 7 | 6 | 2 | . | . | . | 1 | ||||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 1 | 1 | . | . | . | 1 | 1 | ||||||
| Pearl-bordered Fritillary | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Heath Fritillary | . | . | . | . | . | 6 | 16 | 62 | 91 | 124 | 25 | 1 | . | . | . | . | . | . | . | . | ||||||
| Speckled Wood | 1 | 2 | . | . | . | 10 | 11 | 8 | 13 | 10 | 1 | . | 9 | 9 | 7 | 3 | 10 | 37 | 20 | 17 | ||||||
| Wall Brown | . | . | . | . | 1 | . | . | . | . | . | . | . | 1 | 5 | 2 | 4 | . | 2 | . | . | ||||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | 18 | 24 | 211 | 248 | 196 | 122 | 60 | 12 | 1 | . | ||||||
| Meadow Brown | . | . | . | . | . | . | . | 4 | 37 | 92 | 197 | 114 | 90 | 60 | 34 | 29 | 8 | 1 | . | . | ||||||
| Small Heath | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | ||||||
| Ringlet | . | . | . | . | . | . | . | 1 | 3 | 18 | 118 | 4 | 5 | 1 | . | . | . | . | . | . | ||||||