Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 0 13:45
1958 0 4:00
1977 4 29:30
1978 13 27:30
1982 0 3:00
1986 44 50:00
1987 446 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 61 44:15
2005 1696 1018:50
2006 762 647:30
2007 366 816:41
2008 465 648:15
2009 537 446:08
2010 413 645:00
2011 1246 681:30
2012 1041 422:55
2013 4650 613:10
2014 1047 473:05
2015 441 560:45
2016 1387 427:55
2017 1567 576:05
2018 489 430:45
2019 636 455:27
2020 1638 506:07
2021 953 676:28
 
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