Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 0 66:45
1998 0 46:00
1999 0 79:15
2000 0 114:15
2001 0 119:45
2002 2 311:15
2003 0 433:15
2004 2 539:15
2005 1 741:30
2006 3 671:30
2007 3 742:30
2008 5 700:00
2009 2 629:45
2010 0 570:15
2011 3 520:15
2012 1 543:15
2013 2 410:30
2014 3 500:15
2015 5 683:45
2016 6 688:45
2017 13 671:00
2018 6 739:00
2019 5 564:00
 
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