
| 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 | . | . | . | . | . | . | . | . | . | 2 | 1 | 8 | 5 | 8 | 1 | . | . | . | . | . | . | |||||
| Large Skipper | 12 | . | . | . | . | . | . | 3 | 3 | 2 | 3 | 1 | . | . | . | . | . | . | . | . | . | . | |||||
| Dingy Skipper | 12 | . | . | . | 3 | 3 | . | 2 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | 6 | . | . | 1 | . | 1 | . | 1 | 1 | . | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Clouded Yellow | NI | . | . | . | . | . | . | . | . | . | . | . | 4 | . | . | . | . | . | . | . | . | . | |||||
| Brimstone | 74 | 1 | 4 | 2 | 2 | 11 | 4 | . | 4 | 3 | . | . | 3 | 2 | 4 | 7 | 5 | 2 | 1 | 1 | . | . | |||||
| Large White | 69 | . | . | . | . | . | . | 4 | . | . | . | . | 3 | 3 | 9 | 22 | 10 | . | 1 | . | . | . | |||||
| Small White | 159 | . | 5 | 3 | 10 | 13 | . | 2 | 2 | 3 | . | . | 13 | 9 | 18 | 15 | 11 | 3 | 3 | 3 | 3 | 2 | |||||
| Green-veined White | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | |||||
| Green Hairstreak | 2 | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Small Copper | 11 | . | . | 4 | 4 | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | |||||
| Small Blue | 5 | . | . | . | . | . | . | 2 | . | 1 | 2 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Argus | 15 | . | . | . | . | . | 2 | 1 | 1 | . | 4 | . | . | 3 | 1 | . | . | . | . | . | . | . | |||||
| Common Blue | 94 | . | . | . | . | . | 6 | 12 | 9 | 12 | 8 | 3 | . | . | 3 | 11 | 7 | 4 | 3 | 2 | 1 | . | |||||
| Chalk-hill Blue | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | |||||
| Adonis Blue | 17 | . | . | . | . | . | 1 | 1 | 1 | 2 | 2 | . | . | . | . | . | 1 | 2 | 2 | 2 | 1 | . | |||||
| Red Admiral | 29 | . | . | . | . | . | . | . | . | . | . | . | 4 | 8 | 2 | 3 | . | . | . | . | 2 | 1 | |||||
| Small Tortoiseshell | 6 | 1 | 1 | . | . | . | . | 1 | 1 | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Peacock | NI | 1 | 8 | 4 | 3 | 2 | . | 1 | 1 | 3 | . | . | 2 | 12 | 9 | . | . | . | . | . | . | . | |||||
| Dark Green Fritillary | NI | . | . | . | . | . | . | . | . | . | . | . | 4 | 1 | 1 | . | . | . | . | . | . | . | |||||
| Marbled White | 311 | . | . | . | . | . | . | . | 6 | 12 | 188 | 42 | 13 | 3 | 1 | . | . | . | . | . | . | . | |||||
| Gatekeeper / Hedge Brown | NI | . | . | . | . | . | . | . | . | . | . | . | 2 | 10 | 16 | 5 | 2 | . | . | . | . | . | |||||
| Meadow Brown | NI | . | . | . | . | . | . | . | 1 | 3 | 5 | 1 | 37 | 20 | 32 | 15 | 7 | 3 | 1 | . | . | . | |||||
| Small Heath | 25 | . | . | . | . | 2 | 5 | 4 | 4 | . | 1 | . | 1 | . | . | . | . | 1 | 1 | . | . | . | |||||
| Ringlet | NI | . | . | . | . | . | . | . | . | . | . | . | 5 | . | . | . | . | . | . | . | . | . | |||||