Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
1997 11 63:45
1998 4 48:00
1999 4 79:45
2000 11 114:15
2001 47 130:55
2002 41 311:10
2003 69 434:00
2004 106 539:15
2005 127 741:30
2006 85 671:30
2007 102 742:30
2008 140 700:00
2009 101 629:45
2010 49 570:15
2011 97 520:15
2012 95 543:15
2013 62 410:30
2014 107 500:15
2015 98 683:45
2016 164 688:45
2017 116 671:00
2018 114 739:00
2019 100 737:00
2020 116 795:00
2021 93 787:15
2022 105 648:40
2023 7 74:47
 
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