Phenology

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Migration site
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Period
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Year Migration site First Migration site Last
2021
VRS Castricum 4 April     
VRS Castricum 8 October
2020
VRS Castricum 4 April     
VRS Castricum 14 October
2019
VRS Castricum 4 April     
VRS Castricum 31 October
2018
VRS Castricum 4 April     
VRS Castricum 4 November
2017
VRS Castricum 31 March     
VRS Castricum 19 October
2016
VRS Castricum 2 April     
VRS Castricum 26 October
2015
VRS Castricum 12 April     
VRS Castricum 22 October
2014
VRS Castricum 1 April     
VRS Castricum 20 November
2013
VRS Castricum 14 April     
VRS Castricum 14 October
2012
VRS Castricum 1 April     
VRS Castricum 20 October
2011
VRS Castricum 26 March     
VRS Castricum 28 October
2010
VRS Castricum 2 April     
VRS Castricum 21 November
2009
VRS Castricum 2 April     
VRS Castricum 11 October
2008
VRS Castricum 28 March     
VRS Castricum 3 November
2007
VRS Castricum 1 April     
VRS Castricum 30 September
2006
VRS Castricum 4 April     
VRS Castricum 26 October
2005
VRS Castricum 27 March     
VRS Castricum 30 October
2004
VRS Castricum 3 April     
VRS Castricum 2 October
2003
VRS Castricum 26 March     
VRS Castricum 3 October
2002
VRS Castricum 31 March     
VRS Castricum 13 October
2001
VRS Castricum 30 March     
VRS Castricum 18 October
2000
VRS Castricum 3 April     
VRS Castricum 24 November
1999
VRS Castricum 29 March     
VRS Castricum 5 November
1998
VRS Castricum 31 March     
VRS Castricum 10 October
1997
VRS Castricum 9 April     
VRS Castricum 18 September
1996
VRS Castricum 8 April     
VRS Castricum 11 October
1995
VRS Castricum 5 April     
VRS Castricum 1 October
1994
VRS Castricum 6 April     
VRS Castricum 18 October
1993
VRS Castricum 3 April     
VRS Castricum 17 October
1992
VRS Castricum 8 April     
VRS Castricum 4 October
1991
VRS Castricum 30 March     
VRS Castricum 22 October
1990
VRS Castricum 2 April     
VRS Castricum 2 October
1989
VRS Castricum 28 March     
VRS Castricum 9 October
1988
VRS Castricum 18 July     
VRS Castricum 22 September
1987
VRS Castricum 10 April     
VRS Castricum 20 October
1986
VRS Castricum 17 April     
VRS Castricum 14 November
1985
VRS Castricum 1 August     
VRS Castricum 13 October
1984
VRS Castricum 31 July     
VRS Castricum 8 October
1983
VRS Castricum 1 August     
VRS Castricum 22 October
1982
VRS Castricum 5 April     
VRS Castricum 3 November
1981
VRS Castricum 5 April     
VRS Castricum 17 September
1980
VRS Castricum 31 July     
VRS Castricum 10 October
1979
VRS Castricum 1 August     
VRS Castricum 15 October
1978
VRS Castricum 1 August     
VRS Castricum 13 October
1977
VRS Castricum 16 April     
VRS Castricum 7 October
1976
VRS Castricum 14 August     
VRS Castricum 17 October
1975
VRS Castricum 6 August     
VRS Castricum 1 November
1974
VRS Castricum 19 August     
VRS Castricum 14 September
1973
VRS Castricum 28 July     
VRS Castricum 15 October
1970
VRS Castricum 13 October     
VRS Castricum 13 October
1967
VRS Castricum 16 September     
VRS Castricum 16 September
1964
VRS Castricum 8 August     
VRS Castricum 8 August
1961
VRS Castricum 1 July     
VRS Castricum 1 July
 
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