Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 6 13:45
1958 0 4:00
1977 47 29:30
1978 85 27:30
1982 1 3:00
1986 4 50:00
1987 5 56:35
2001 0 0:00
2002 0 0:00
2003 4 12:30
2004 35 44:15
2005 605 1018:50
2006 330 647:30
2007 397 816:41
2008 70 648:15
2009 100 446:08
2010 103 645:00
2011 110 681:30
2012 69 422:55
2013 69 613:10
2014 133 473:05
2015 40 560:45
2016 89 427:55
2017 82 576:05
2018 83 430:45
2019 25 455:27
2020 24 437:32
 
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