Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Terschelling, Paal 18 | 5 November | Terschelling, Paal 18 | 5 November | |||||
| 2019 | Terschelling, Paal 18 | 31 January | Terschelling, Paal 18 | 16 November | |||||
| 2017 | Terschelling, Paal 18 | 15 September | Terschelling, Paal 18 | 7 October | |||||
| 2015 | Terschelling, Paal 18 | 27 September | Terschelling, Paal 18 | 27 September | |||||
| 2013 | Terschelling, Paal 18 | 12 January | Terschelling, Paal 18 | 6 September | |||||
| 2012 | Terschelling, Paal 18 | 17 November | Terschelling, Paal 18 | 17 November | |||||
| 2010 | Terschelling, Paal 18 | 11 December | Terschelling, Paal 18 | 11 December | |||||
| 2003 | Terschelling, Paal 18 | 30 August | Terschelling, Paal 18 | 30 August | |||||
| 1995 | Terschelling, Paal 18 | 22 October | Terschelling, Paal 18 | 22 October | |||||
| 1994 | Terschelling, Paal 18 | 18 August | Terschelling, Paal 18 | 1 October | |||||
| 1992 | Terschelling, Paal 18 | 22 April | Terschelling, Paal 18 | 22 April | |||||
| 1989 | Terschelling, Paal 18 | 25 February | Terschelling, Paal 18 | 5 October | |||||
| 1988 | Terschelling, Paal 18 | 8 October | Terschelling, Paal 18 | 30 October | |||||
| 1987 | Terschelling, Paal 18 | 4 October | Terschelling, Paal 18 | 4 October | |||||
| 1986 | Terschelling, Paal 18 | 8 August | Terschelling, Paal 18 | 8 August | |||||
| 1985 | Terschelling, Paal 18 | 9 August | Terschelling, Paal 18 | 9 August | |||||
| 1984 | Terschelling, Paal 18 | 16 August | Terschelling, Paal 18 | 16 August | |||||
| 1983 | Terschelling, Paal 18 | 20 September | Terschelling, Paal 18 | 13 October | |||||
| 1982 | Terschelling, Paal 18 | 1 October | Terschelling, Paal 18 | 5 November | |||||
| 1981 | Terschelling, Paal 18 | 8 July | Terschelling, Paal 18 | 23 October | |||||
| 1980 | Terschelling, Paal 18 | 15 August | Terschelling, Paal 18 | 21 September | |||||
| 1979 | Terschelling, Paal 18 | 12 August | Terschelling, Paal 18 | 12 August | |||||
| 1978 | Terschelling, Paal 18 | 31 March | Terschelling, Paal 18 | 15 October | |||||
| 1977 | Terschelling, Paal 18 | 25 March | Terschelling, Paal 18 | 4 August | |||||
| 1976 | Terschelling, Paal 18 | 11 April | Terschelling, Paal 18 | 13 August | |||||
| 1972 | Terschelling, Paal 18 | 30 July | Terschelling, Paal 18 | 30 July |
