Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2013 |  |
VRS Castricum | 16 September | |
VRS Castricum | 16 September | |||
| 2011 | |
VRS Castricum | 26 June | |
VRS Castricum | 16 September | |||
| 2010 | |
VRS Castricum | 30 July | |
VRS Castricum | 30 July | |||
| 2009 | |
VRS Castricum | 13 September | |
VRS Castricum | 13 September | |||
| 2008 | |
VRS Castricum | 20 September | |
VRS Castricum | 20 September | |||
| 2005 | |
VRS Castricum | 10 June | |
VRS Castricum | 8 October | |||
| 2004 | |
VRS Castricum | 9 October | |
VRS Castricum | 9 October | |||
| 2003 | |
VRS Castricum | 18 September | |
VRS Castricum | 3 October | |||
| 2002 | |
VRS Castricum | 17 May | |
VRS Castricum | 17 September | |||
| 2001 | |
VRS Castricum | 20 July | |
VRS Castricum | 20 July | |||
| 1997 | |
VRS Castricum | 27 September | |
VRS Castricum | 27 September | |||
| 1995 | |
VRS Castricum | 12 September | |
VRS Castricum | 12 September | |||
| 1994 | |
VRS Castricum | 17 April | |
VRS Castricum | 21 August | |||
| 1993 | |
VRS Castricum | 11 August | |
VRS Castricum | 11 August | |||
| 1992 | |
VRS Castricum | 16 May | |
VRS Castricum | 21 September | |||
| 1991 | |
VRS Castricum | 5 September | |
VRS Castricum | 29 September | |||
| 1990 | |
VRS Castricum | 23 July | |
VRS Castricum | 12 August | |||
| 1989 | |
VRS Castricum | 26 September | |
VRS Castricum | 26 September | |||
| 1988 | |
VRS Castricum | 13 October | |
VRS Castricum | 13 October | |||
| 1986 | |
VRS Castricum | 10 August | |
VRS Castricum | 10 October | |||
| 1984 | |
VRS Castricum | 21 September | |
VRS Castricum | 21 September | |||
| 1983 | |
VRS Castricum | 1 August | |
VRS Castricum | 2 September | |||
| 1982 | |
VRS Castricum | 1 September | |
VRS Castricum | 1 September | |||
| 1981 | |
VRS Castricum | 1 September | |
VRS Castricum | 1 September | |||
| 1980 | |
VRS Castricum | 1 September | |
VRS Castricum | 1 September | |||
| 1979 | |
VRS Castricum | 28 October | |
VRS Castricum | 28 October | |||
| 1978 | |
VRS Castricum | 1 September | |
VRS Castricum | 1 September | |||
| 1977 | |
VRS Castricum | 26 August | |
VRS Castricum | 10 October | |||
| 1974 | |
VRS Castricum | 24 October | |
VRS Castricum | 24 October |
