Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 25 13:45
1977 2 29:30
1978 4 27:30
1982 6 3:00
1986 0 50:00
1987 107 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 1 44:15
2005 900 1018:50
2006 319 647:30
2007 820 816:41
2008 654 648:15
2009 271 446:08
2010 793 645:00
2011 1311 681:30
2012 374 422:55
2013 918 613:10
2014 523 473:05
2015 461 560:45
2016 797 427:55
2017 1228 576:05
2018 479 430:45
2019 788 455:27
2020 99 397:09
 
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