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 1 311:15
2003 2 433:15
2004 4 539:15
2005 6 741:30
2006 11 671:30
2007 17 742:30
2008 13 700:00
2009 13 629:45
2010 8 570:15
2011 8 520:15
2012 15 543:15
2013 10 410:30
2014 10 500:15
2015 22 683:45
2016 29 688:45
2017 40 671:00
2018 46 739:00
2019 31 553:30
 
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