Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Stonar, Kent (nocturnal flight calls) | 4 March | Stonar, Kent (nocturnal flight calls) | 8 November | |||||
| 2019 | Stonar, Kent (nocturnal flight calls) | 28 March | Stonar, Kent (nocturnal flight calls) | 29 October | |||||
| 2018 | Stonar, Kent (nocturnal flight calls) | 14 March | Stonar, Kent (nocturnal flight calls) | 28 October | |||||
| 2017 | Stonar, Kent (nocturnal flight calls) | 9 October | Stonar, Kent (nocturnal flight calls) | 30 October |
