Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 20 13:45
1958 36 4:00
1977 21 29:30
1978 96 27:30
1982 0 3:00
1986 2 50:00
1987 13 56:35
2001 0 0:00
2002 0 0:00
2003 30 12:30
2004 4 44:15
2005 1122 1018:50
2006 625 647:30
2007 352 816:41
2008 600 648:15
2009 360 446:08
2010 439 645:00
2011 757 681:30
2012 397 422:55
2013 394 613:10
2014 122 473:05
2015 78 560:45
2016 61 427:55
2017 51 576:05
2018 97 430:45
2019 70 455:27
2020 40 423:22
 
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