Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Terschelling, Paal 18 | 20 September | Terschelling, Paal 18 | 14 October | |||||
| 2019 | Terschelling, Paal 18 | 31 January | Terschelling, Paal 18 | 22 October | |||||
| 2018 | Terschelling, Paal 18 | 21 September | Terschelling, Paal 18 | 11 November | |||||
| 2017 | Terschelling, Paal 18 | 22 October | Terschelling, Paal 18 | 22 October | |||||
| 2016 | Terschelling, Paal 18 | 19 November | Terschelling, Paal 18 | 19 November | |||||
| 2015 | Terschelling, Paal 18 | 22 September | Terschelling, Paal 18 | 22 September | |||||
| 2014 | Terschelling, Paal 18 | 11 October | Terschelling, Paal 18 | 11 October | |||||
| 2013 | Terschelling, Paal 18 | 2 April | Terschelling, Paal 18 | 4 October | |||||
| 2012 | Terschelling, Paal 18 | 17 November | Terschelling, Paal 18 | 17 November | |||||
| 2011 | Terschelling, Paal 18 | 17 September | Terschelling, Paal 18 | 17 September | |||||
| 2009 | Terschelling, Paal 18 | 8 August | Terschelling, Paal 18 | 22 November | |||||
| 2008 | Terschelling, Paal 18 | 18 September | Terschelling, Paal 18 | 2 October | |||||
| 2007 | Terschelling, Paal 18 | 5 September | Terschelling, Paal 18 | 16 September | |||||
| 2005 | Terschelling, Paal 18 | 6 August | Terschelling, Paal 18 | 19 November | |||||
| 2000 | Terschelling, Paal 18 | 27 September | Terschelling, Paal 18 | 13 October | |||||
| 1997 | Terschelling, Paal 18 | 1 February | Terschelling, Paal 18 | 1 February | |||||
| 1994 | Terschelling, Paal 18 | 3 September | Terschelling, Paal 18 | 3 September | |||||
| 1991 | Terschelling, Paal 18 | 12 September | Terschelling, Paal 18 | 12 September | |||||
| 1989 | Terschelling, Paal 18 | 5 October | Terschelling, Paal 18 | 5 October | |||||
| 1985 | Terschelling, Paal 18 | 6 July | Terschelling, Paal 18 | 1 November | |||||
| 1984 | Terschelling, Paal 18 | 30 September | Terschelling, Paal 18 | 3 October | |||||
| 1983 | Terschelling, Paal 18 | 18 September | Terschelling, Paal 18 | 15 October | |||||
| 1982 | Terschelling, Paal 18 | 5 November | Terschelling, Paal 18 | 5 November | |||||
| 1981 | Terschelling, Paal 18 | 9 August | Terschelling, Paal 18 | 27 October | |||||
| 1980 | Terschelling, Paal 18 | 24 July | Terschelling, Paal 18 | 10 September | |||||
| 1979 | Terschelling, Paal 18 | 8 August | Terschelling, Paal 18 | 27 September | |||||
| 1978 | Terschelling, Paal 18 | 31 March | Terschelling, Paal 18 | 9 August | |||||
| 1976 | Terschelling, Paal 18 | 16 April | Terschelling, Paal 18 | 16 April | |||||
| 1975 | Terschelling, Paal 18 | 6 May | Terschelling, Paal 18 | 6 May |
