Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 294 66:45
1998 54 46:00
1999 78 79:15
2000 1049 114:15
2001 487 119:45
2002 1586 311:15
2003 1771 433:15
2004 4172 539:15
2005 7526 741:30
2006 4373 671:30
2007 13789 742:30
2008 7914 700:00
2009 12704 629:45
2010 9523 570:15
2011 18913 520:15
2012 14847 543:15
2013 6672 410:30
2014 5348 500:15
2015 10440 683:45
2016 22385 688:45
2017 15236 671:00
2018 14164 739:00
2019 10665 642:45
 
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