Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1958 0 4:00
1977 0 29:30
1978 0 27:30
1982 0 3:00
1986 97 50:00
1987 0 56:35
2001 0 0:00
2002 0 0:00
2003 18 12:30
2004 5 44:15
2005 774 1018:50
2006 1542 647:30
2007 592 816:41
2008 836 648:15
2009 1398 446:08
2010 1682 645:00
2011 2512 681:30
2012 938 422:55
2013 1597 613:10
2014 395 473:05
2015 1290 560:45
2016 554 427:55
2017 398 576:05
2018 231 430:45
2019 639 455:27
2020 815 506:07
2021 1306 771:15
 
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