Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1977 3 29:30
1978 0 27:30
1982 0 3:00
1986 0 50:00
1987 3 56:35
2001 0 0:00
2002 0 0:00
2003 48 12:30
2004 43 44:15
2005 1387 1018:50
2006 409 647:30
2007 562 816:41
2008 775 648:15
2009 315 446:08
2010 813 645:00
2011 600 681:30
2012 564 422:55
2013 648 613:10
2014 165 473:05
2015 469 560:45
2016 133 427:55
2017 422 576:05
2018 382 430:45
2019 309 455:27
2020 359 397:09
 
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