Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
1997 41 63:45
1998 121 48:00
1999 50 79:45
2000 28 114:15
2001 173 130:55
2002 157 311:10
2003 282 434:00
2004 1576 539:15
2005 1581 741:30
2006 534 671:30
2007 914 742:30
2008 1680 700:00
2009 664 629:45
2010 817 570:15
2011 1410 520:15
2012 923 543:15
2013 510 410:30
2014 439 500:15
2015 752 683:45
2016 707 688:45
2017 302 671:00
2018 413 739:00
2019 682 737:00
2020 734 795:00
2021 561 787:15
2022 529 523:00
 
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