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 0 27:30
1982 0 3:00
1986 0 50:00
1987 0 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 66 44:15
2005 1766 1018:50
2006 1945 647:30
2007 1125 816:41
2008 2920 648:15
2009 565 446:08
2010 2673 645:00
2011 504 681:30
2012 809 422:55
2013 1100 613:10
2014 111 473:05
2015 119 560:45
2016 370 427:55
2017 3497 576:05
2018 203 430:45
2019 1585 455:27
2020 569 506:07
2021 816 936:39
 
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