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 1 119:45
2002 0 311:15
2003 1 433:15
2004 1 539:15
2005 1 741:30
2006 2 671:30
2007 0 742:30
2008 1 700:00
2009 3 629:45
2010 2 570:15
2011 1 520:15
2012 0 543:15
2013 1 410:30
2014 0 500:15
2015 0 683:45
2016 4 688:45
2017 0 671:00
2018 2 739:00
2019 1 638:15
 
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