Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 11 13:45
1958 33 4:00
1977 279 29:30
1978 199 27:30
1982 26 3:00
1986 1 50:00
1987 48 56:35
2001 0 0:00
2002 0 0:00
2003 2544 12:30
2004 1284 44:15
2005 40010 1018:50
2006 25021 647:30
2007 28229 816:41
2008 21892 648:15
2009 17374 446:08
2010 19560 645:00
2011 19216 681:30
2012 15638 422:55
2013 16640 613:10
2014 13773 473:05
2015 21988 560:45
2016 14652 427:55
2017 18676 576:05
2018 16109 430:45
2019 13867 455:27
2020 16518 506:07
2021 36731 683:43
 
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