Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 5 13:45
1977 4 29:30
1978 19 27:30
1982 0 3:00
1986 52 50:00
1987 182 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 7 44:15
2005 2959 1018:50
2006 1205 647:30
2007 3171 816:41
2008 2685 648:15
2009 1199 446:08
2010 1739 645:00
2011 2894 681:30
2012 1725 422:55
2013 2118 613:10
2014 647 473:05
2015 763 560:45
2016 1324 427:55
2017 1613 576:05
2018 671 430:45
2019 520 455:27
2020 951 397:09
 
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