Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 1 63:45
1998 0 48:00
1999 0 79:45
2000 0 114:15
2001 1 130:55
2002 3 311:10
2003 2 434:00
2004 5 539:15
2005 13 741:30
2006 8 671:30
2007 11 742:30
2008 19 700:00
2009 11 629:45
2010 12 570:15
2011 9 520:15
2012 4 543:15
2013 2 410:30
2014 12 500:15
2015 14 683:45
2016 30 688:45
2017 8 671:00
2018 4 739:00
2019 35 737:00
2020 24 780:30
 
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