Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 0 66:45
1998 0 46:00
1999 2 79:15
2000 0 114:15
2001 4 119:45
2002 8 311:15
2003 5 433:15
2004 8 539:15
2005 13 741:30
2006 12 671:30
2007 18 742:30
2008 14 700:00
2009 11 629:45
2010 17 570:15
2011 19 520:15
2012 18 543:15
2013 16 410:30
2014 19 500:15
2015 16 683:45
2016 14 688:45
2017 9 671:00
2018 15 739:00
2019 3 553:30
 
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