Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1958 0 4:00
1977 731 29:30
1978 615 27:30
1982 3 3:00
1986 2721 50:00
1987 5800 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 496 44:15
2005 45792 1018:50
2006 19874 647:30
2007 51628 816:41
2008 17619 648:15
2009 8539 446:08
2010 12533 645:00
2011 13586 681:30
2012 16365 422:55
2013 5304 613:10
2014 10010 473:05
2015 6449 560:45
2016 4293 427:55
2017 15493 576:05
2018 15598 430:45
2019 4566 455:27
2020 15179 506:07
2021 5931 683:43
 
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