Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1977 24 29:30
1978 17 27:30
1982 0 3:00
1986 1 50:00
1987 354 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 0 44:15
2005 1423 1018:50
2006 445 647:30
2007 712 816:41
2008 643 648:15
2009 618 446:08
2010 777 645:00
2011 1909 681:30
2012 956 422:55
2013 1403 613:10
2014 661 473:05
2015 365 560:45
2016 778 427:55
2017 550 576:05
2018 1061 430:45
2019 1108 455:27
2020 418 397:09
 
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