Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 174 13:45
1977 121 29:30
1978 50 27:30
1982 5 3:00
1986 15 50:00
1987 118 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 37 44:15
2005 433 1018:50
2006 195 647:30
2007 386 816:41
2008 191 648:15
2009 107 446:08
2010 216 645:00
2011 103 681:30
2012 216 422:55
2013 204 613:10
2014 78 473:05
2015 141 560:45
2016 72 427:55
2017 108 576:05
2018 110 430:45
2019 104 455:27
2020 6 397:09
 
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