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 0 311:15
2003 0 433:15
2004 0 539:15
2005 0 741:30
2006 0 671:30
2007 0 742:30
2008 0 700:00
2009 0 629:45
2010 2 570:15
2011 0 520:15
2012 0 543:15
2013 0 410:30
2014 0 500:15
2015 2 683:45
2016 0 688:45
2017 1 671:00
2018 1 739:00
2019 2 730:00
 
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