Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites
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Year Totals Observation hours
1997 3 63:45
1998 4 48:00
1999 3 79:45
2000 6 114:15
2001 6 130:55
2002 12 311:10
2003 11 434:00
2004 15 539:15
2005 26 741:30
2006 22 671:30
2007 36 742:30
2008 28 700:00
2009 13 629:45
2010 27 570:15
2011 30 520:15
2012 14 543:15
2013 17 410:30
2014 44 500:15
2015 22 683:45
2016 36 688:45
2017 23 671:00
2018 22 739:00
2019 66 737:00
2020 42 795:00
2021 17 787:15
2022 24 648:40
2023 23 307:57
 
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