Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1958 0 4:00
1977 296 29:30
1978 167 27:30
1982 1 3:00
1986 572 50:00
1987 3629 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 180 44:15
2005 20879 1018:50
2006 22738 647:30
2007 21270 816:41
2008 15158 648:15
2009 10839 446:08
2010 12719 645:00
2011 14194 681:30
2012 10648 422:55
2013 33487 613:10
2014 13671 473:05
2015 21514 560:45
2016 7102 427:55
2017 17068 576:05
2018 4699 430:45
2019 7794 455:27
2020 3557 397:09
 
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