Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1958 0 4:00
1977 0 29:30
1978 3 27:30
1982 0 3:00
1986 2 50:00
1987 2 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 0 44:15
2005 46 1018:50
2006 11 647:30
2007 7 816:41
2008 8 648:15
2009 4 446:08
2010 6 645:00
2011 9 681:30
2012 1 422:55
2013 8 613:10
2014 4 473:05
2015 6 560:45
2016 1 427:55
2017 10 576:05
2018 10 430:45
2019 0 455:27
2020 6 423:22
 
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