Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 0 66:45
1998 17 46:00
1999 5 79:15
2000 16 114:15
2001 20 119:45
2002 37 311:15
2003 51 433:15
2004 141 539:15
2005 322 741:30
2006 84 671:30
2007 112 742:30
2008 179 700:00
2009 138 629:45
2010 179 570:15
2011 94 520:15
2012 100 543:15
2013 149 410:30
2014 263 500:15
2015 623 683:45
2016 119 688:45
2017 340 671:00
2018 240 739:00
2019 106 731:30
 
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