Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Terschelling, Paal 18 | 17 October | Terschelling, Paal 18 | 18 October | |||||
| 2017 | Terschelling, Paal 18 | 5 October | Terschelling, Paal 18 | 27 October | |||||
| 2015 | Terschelling, Paal 18 | 19 September | Terschelling, Paal 18 | 19 September | |||||
| 2014 | Terschelling, Paal 18 | 27 September | Terschelling, Paal 18 | 14 October | |||||
| 2013 | Terschelling, Paal 18 | 10 October | Terschelling, Paal 18 | 24 November | |||||
| 2012 | Terschelling, Paal 18 | 18 August | Terschelling, Paal 18 | 24 September | |||||
| 2011 | Terschelling, Paal 18 | 31 August | Terschelling, Paal 18 | 5 October | |||||
| 2009 | Terschelling, Paal 18 | 5 September | Terschelling, Paal 18 | 5 September | |||||
| 2008 | Terschelling, Paal 18 | 5 January | Terschelling, Paal 18 | 10 October | |||||
| 2007 | Terschelling, Paal 18 | 17 October | Terschelling, Paal 18 | 17 October | |||||
| 2006 | Terschelling, Paal 18 | 9 September | Terschelling, Paal 18 | 9 September | |||||
| 2004 | Terschelling, Paal 18 | 7 October | Terschelling, Paal 18 | 13 November | |||||
| 2003 | Terschelling, Paal 18 | 1 September | Terschelling, Paal 18 | 1 September | |||||
| 2001 | Terschelling, Paal 18 | 5 October | Terschelling, Paal 18 | 5 October | |||||
| 1991 | Terschelling, Paal 18 | 15 September | Terschelling, Paal 18 | 15 September | |||||
| 1988 | Terschelling, Paal 18 | 1 September | Terschelling, Paal 18 | 1 September | |||||
| 1987 | Terschelling, Paal 18 | 5 August | Terschelling, Paal 18 | 3 October | |||||
| 1985 | Terschelling, Paal 18 | 9 August | Terschelling, Paal 18 | 29 October | |||||
| 1984 | Terschelling, Paal 18 | 15 August | Terschelling, Paal 18 | 21 September | |||||
| 1983 | Terschelling, Paal 18 | 15 August | Terschelling, Paal 18 | 15 August | |||||
| 1980 | Terschelling, Paal 18 | 26 July | Terschelling, Paal 18 | 15 September | |||||
| 1979 | Terschelling, Paal 18 | 6 August | Terschelling, Paal 18 | 17 August | |||||
| 1978 | Terschelling, Paal 18 | 12 August | Terschelling, Paal 18 | 13 October | |||||
| 1977 | Terschelling, Paal 18 | 7 August | Terschelling, Paal 18 | 10 August | |||||
| 1972 | Terschelling, Paal 18 | 8 August | Terschelling, Paal 18 | 8 August |
