Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Terschelling, Paal 18 | 25 September | Terschelling, Paal 18 | 25 September | |||||
| 2019 | Terschelling, Paal 18 | 7 August | Terschelling, Paal 18 | 18 September | |||||
| 2018 | Terschelling, Paal 18 | 18 August | Terschelling, Paal 18 | 18 August | |||||
| 2017 | Terschelling, Paal 18 | 14 May | Terschelling, Paal 18 | 15 June | |||||
| 2015 | Terschelling, Paal 18 | 19 September | Terschelling, Paal 18 | 22 September | |||||
| 2013 | Terschelling, Paal 18 | 7 May | Terschelling, Paal 18 | 7 May | |||||
| 2012 | Terschelling, Paal 18 | 12 May | Terschelling, Paal 18 | 13 May | |||||
| 2011 | Terschelling, Paal 18 | 30 August | Terschelling, Paal 18 | 1 September | |||||
| 2009 | Terschelling, Paal 18 | 5 August | Terschelling, Paal 18 | 5 August | |||||
| 2008 | Terschelling, Paal 18 | 7 September | Terschelling, Paal 18 | 7 September | |||||
| 2007 | Terschelling, Paal 18 | 14 September | Terschelling, Paal 18 | 14 September | |||||
| 2006 | Terschelling, Paal 18 | 26 August | Terschelling, Paal 18 | 26 August | |||||
| 1998 | Terschelling, Paal 18 | 17 August | Terschelling, Paal 18 | 17 August | |||||
| 1994 | Terschelling, Paal 18 | 31 August | Terschelling, Paal 18 | 2 September | |||||
| 1993 | Terschelling, Paal 18 | 9 May | Terschelling, Paal 18 | 9 May | |||||
| 1992 | Terschelling, Paal 18 | 23 April | Terschelling, Paal 18 | 23 April | |||||
| 1990 | Terschelling, Paal 18 | 8 September | Terschelling, Paal 18 | 8 September | |||||
| 1988 | Terschelling, Paal 18 | 18 May | Terschelling, Paal 18 | 1 September | |||||
| 1986 | Terschelling, Paal 18 | 12 August | Terschelling, Paal 18 | 12 October | |||||
| 1985 | Terschelling, Paal 18 | 6 July | Terschelling, Paal 18 | 9 September | |||||
| 1984 | Terschelling, Paal 18 | 8 August | Terschelling, Paal 18 | 15 August | |||||
| 1983 | Terschelling, Paal 18 | 13 August | Terschelling, Paal 18 | 9 October | |||||
| 1982 | Terschelling, Paal 18 | 27 August | Terschelling, Paal 18 | 4 September | |||||
| 1981 | Terschelling, Paal 18 | 13 July | Terschelling, Paal 18 | 15 September | |||||
| 1980 | Terschelling, Paal 18 | 26 July | Terschelling, Paal 18 | 10 September | |||||
| 1979 | Terschelling, Paal 18 | 7 August | Terschelling, Paal 18 | 17 August | |||||
| 1978 | Terschelling, Paal 18 | 6 August | Terschelling, Paal 18 | 16 October | |||||
| 1977 | Terschelling, Paal 18 | 28 April | Terschelling, Paal 18 | 10 August | |||||
| 1976 | Terschelling, Paal 18 | 7 August | Terschelling, Paal 18 | 7 August | |||||
| 1975 | Terschelling, Paal 18 | 5 September | Terschelling, Paal 18 | 5 September | |||||
| 1973 | Terschelling, Paal 18 | 1 August | Terschelling, Paal 18 | 1 August |
