Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1958 0 4:00
1977 5 29:30
1978 0 27:30
1982 0 3:00
1986 13 50:00
1987 97 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 20 44:15
2005 1989 1018:50
2006 2400 647:30
2007 1183 816:41
2008 2447 648:15
2009 625 446:08
2010 698 645:00
2011 1145 681:30
2012 887 422:55
2013 1366 613:10
2014 463 473:05
2015 816 560:45
2016 463 427:55
2017 712 576:05
2018 1238 430:45
2019 721 455:27
2020 881 506:07
2021 4557 983:33
 
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