Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 1 66:45
1998 0 46:00
1999 2 79:15
2000 0 114:15
2001 3 119:45
2002 4 311:15
2003 8 433:15
2004 18 539:15
2005 22 741:30
2006 27 671:30
2007 10 742:30
2008 20 700:00
2009 13 629:45
2010 25 570:15
2011 20 520:15
2012 41 543:15
2013 21 410:30
2014 35 500:15
2015 24 683:45
2016 27 688:45
2017 31 671:00
2018 19 739:00
2019 33 731:30
 
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