Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 1 63:45
1998 0 48:00
1999 4 79:45
2000 15 114:15
2001 3 130:55
2002 10 311:10
2003 4 434:00
2004 1 539:15
2005 25 741:30
2006 94 671:30
2007 6 742:30
2008 39 700:00
2009 26 629:45
2010 10 570:15
2011 10 520:15
2012 10 543:15
2013 5 410:30
2014 80 500:15
2015 68 683:45
2016 38 688:45
2017 12 671:00
2018 44 739:00
2019 33 737:00
2020 23 795:00
2021 36 701:01
 
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