Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1956 8 13:45
1977 67 29:30
1978 0 27:30
1982 0 3:00
1986 1 50:00
1987 9 56:35
2001 0 0:00
2002 0 0:00
2003 0 12:30
2004 10 44:15
2005 790 1018:50
2006 1201 647:30
2007 590 816:41
2008 1112 648:15
2009 511 446:08
2010 2620 645:00
2011 544 681:30
2012 541 422:55
2013 504 613:10
2014 185 473:05
2015 613 560:45
2016 361 427:55
2017 603 576:05
2018 388 430:45
2019 920 455:27
2020 405 397:09
 
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