Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 0 63:45
1998 0 48:00
1999 0 79:45
2000 0 114:15
2001 1 130:55
2002 2 311:10
2003 1 434:00
2004 2 539:15
2005 0 741:30
2006 1 671:30
2007 1 742:30
2008 3 700:00
2009 0 629:45
2010 1 570:15
2011 5 520:15
2012 2 543:15
2013 3 410:30
2014 4 500:15
2015 2 683:45
2016 2 688:45
2017 2 671:00
2018 3 739:00
2019 3 737:00
2020 3 778:30
 
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