Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1977 72 29:30
1978 7 27:30
1982 1 3:00
1986 24 50:00
1987 102 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 7 44:15
2005 2061 1018:50
2006 1333 647:30
2007 1434 816:41
2008 1277 648:15
2009 700 446:08
2010 1150 645:00
2011 1899 681:30
2012 770 422:55
2013 989 613:10
2014 1004 473:05
2015 1368 560:45
2016 621 427:55
2017 1102 576:05
2018 749 430:45
2019 908 455:27
2020 805 397:09
 
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