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 14 April     
VRS Castricum 13 May
2020
VRS Castricum 10 April     
VRS Castricum 11 September
2019
VRS Castricum 17 April     
VRS Castricum 10 September
2018
VRS Castricum 9 April     
VRS Castricum 9 September
2017
VRS Castricum 20 April     
VRS Castricum 16 September
2016
VRS Castricum 14 April     
VRS Castricum 15 September
2015
VRS Castricum 13 April     
VRS Castricum 8 September
2014
VRS Castricum 16 April     
VRS Castricum 5 September
2013
VRS Castricum 16 April     
VRS Castricum 5 October
2012
VRS Castricum 12 April     
VRS Castricum 3 September
2011
VRS Castricum 8 April     
VRS Castricum 26 August
2010
VRS Castricum 13 April     
VRS Castricum 24 September
2009
VRS Castricum 10 April     
VRS Castricum 17 September
2008
VRS Castricum 17 April     
VRS Castricum 17 September
2007
VRS Castricum 20 April     
VRS Castricum 28 August
2006
VRS Castricum 15 April     
VRS Castricum 6 September
2005
VRS Castricum 17 April     
VRS Castricum 6 September
2004
VRS Castricum 20 April     
VRS Castricum 5 September
2003
VRS Castricum 15 April     
VRS Castricum 3 September
2002
VRS Castricum 19 April     
VRS Castricum 3 September
2001
VRS Castricum 14 April     
VRS Castricum 1 September
2000
VRS Castricum 21 April     
VRS Castricum 26 August
1999
VRS Castricum 18 April     
VRS Castricum 27 August
1998
VRS Castricum 21 April     
VRS Castricum 6 September
1997
VRS Castricum 23 April     
VRS Castricum 2 September
1996
VRS Castricum 16 April     
VRS Castricum 6 September
1995
VRS Castricum 23 April     
VRS Castricum 15 September
1994
VRS Castricum 20 April     
VRS Castricum 2 September
1993
VRS Castricum 16 April     
VRS Castricum 29 August
1992
VRS Castricum 26 April     
VRS Castricum 21 August
1991
VRS Castricum 20 April     
VRS Castricum 13 September
1990
VRS Castricum 30 April     
VRS Castricum 2 September
1989
VRS Castricum 3 May     
VRS Castricum 4 September
1988
VRS Castricum 18 July     
VRS Castricum 6 September
1987
VRS Castricum 23 April     
VRS Castricum 31 August
1986
VRS Castricum 27 July     
VRS Castricum 7 September
1985
VRS Castricum 1 August     
VRS Castricum 11 September
1984
VRS Castricum 1 August     
VRS Castricum 25 August
1983
VRS Castricum 1 August     
VRS Castricum 28 August
1982
VRS Castricum 5 May     
VRS Castricum 24 August
1981
VRS Castricum 13 April     
VRS Castricum 26 August
1980
VRS Castricum 1 August     
VRS Castricum 26 August
1979
VRS Castricum 2 August     
VRS Castricum 16 September
1978
VRS Castricum 1 August     
VRS Castricum 25 August
1977
VRS Castricum 22 May     
VRS Castricum 24 August
1975
VRS Castricum 10 August     
VRS Castricum 24 August
 
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