Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 0 66:45
1998 1 46:00
1999 0 79:15
2000 1 114:15
2001 1 119:45
2002 3 311:15
2003 3 433:15
2004 2 539:15
2005 11 741:30
2006 9 671:30
2007 12 742:30
2008 29 700:00
2009 12 629:45
2010 16 570:15
2011 12 520:15
2012 10 543:15
2013 4 410:30
2014 26 500:15
2015 28 683:45
2016 25 688:45
2017 11 671:00
2018 23 739:00
2019 19 451:00
 
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