
| 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 | . | . | . | . | . | . | . | . | . | . | 1 | 42 | 54 | 29 | 30 | 5 | 5 | 1 | 2 | . | . | |||||
| Silver-spotted Skipper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 8 | 14 | 14 | 20 | 3 | 2 | |||||
| Large Skipper | . | . | . | . | . | . | . | . | 1 | 3 | 2 | 3 | 2 | 3 | . | . | . | . | . | . | . | |||||
| Dingy Skipper | . | . | 1 | 2 | 4 | 6 | 6 | . | 2 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | 2 | . | 1 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | 1 | 3 | |||||
| Brimstone | . | . | 5 | 1 | 6 | 5 | 1 | 2 | . | 1 | . | . | 1 | 9 | 26 | 10 | 5 | 8 | 3 | 3 | 4 | |||||
| Large White | . | . | 1 | . | 1 | 2 | . | . | . | . | . | 1 | 5 | 3 | 3 | 3 | 6 | 5 | . | . | . | |||||
| Small White | . | . | . | 3 | 2 | 2 | . | . | . | . | 1 | 2 | 2 | 4 | 9 | 5 | 6 | 5 | 3 | 2 | 2 | |||||
| Green-veined White | . | 1 | . | . | 1 | 5 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Orange Tip | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Green Hairstreak | . | . | 1 | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | . | . | . | . | . | 2 | . | . | . | . | . | . | 2 | 1 | . | 3 | . | . | . | . | 2 | |||||
| Common Blue | . | . | . | . | . | . | 6 | 4 | 5 | . | . | . | . | . | 9 | 15 | 37 | 38 | 49 | 15 | 8 | |||||
| Chalk-hill Blue | . | . | . | . | . | . | . | . | . | . | . | 15 | 118 | 365 | 428 | 349 | 208 | 82 | 46 | 17 | 2 | |||||
| Adonis Blue | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||
| Red Admiral | . | . | . | 2 | . | . | . | . | . | 1 | 5 | 4 | . | 2 | 5 | 6 | 2 | . | . | . | 1 | |||||
| Painted Lady | . | . | . | 1 | . | . | . | . | 1 | . | . | . | . | . | 2 | . | 1 | . | . | . | . | |||||
| Small Tortoiseshell | . | . | . | . | . | . | . | . | 1 | 1 | 1 | 1 | . | . | . | 2 | 18 | 5 | 10 | 3 | 1 | |||||
| Peacock | 1 | 2 | 7 | 2 | 1 | . | . | . | . | . | 2 | . | 1 | 1 | 4 | 8 | 3 | . | 1 | . | . | |||||
| Comma | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 3 | . | . | . | . | 3 | |||||
| Dark Green Fritillary | . | . | . | . | . | . | . | . | . | 1 | 1 | 6 | 3 | 1 | . | 1 | . | . | . | . | . | |||||
| Speckled Wood | . | . | 2 | . | 1 | 4 | 3 | 4 | . | . | . | 1 | . | 1 | 1 | 2 | 3 | 6 | 4 | 1 | . | |||||
| Marbled White | . | . | . | . | . | . | . | . | 9 | 21 | 35 | 63 | 35 | 1 | 1 | . | . | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | 1 | . | 5 | 37 | 44 | 49 | 16 | 21 | 5 | 3 | 10 | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | 4 | 14 | 8 | 22 | 30 | 60 | 136 | 234 | 266 | 396 | 339 | 356 | 191 | 118 | |||||
| Small Heath | . | . | . | . | 2 | . | 3 | 9 | 23 | 14 | 24 | 37 | 15 | 6 | 3 | 3 | 3 | 7 | 8 | . | 2 | |||||
| Ringlet | . | . | . | . | . | . | . | . | 21 | 30 | 46 | 21 | 8 | . | . | . | . | . | . | . | . | |||||