Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 15 66:45
1998 5 46:00
1999 151 79:15
2000 82 114:15
2001 139 119:45
2002 105 311:15
2003 272 433:15
2004 264 539:15
2005 351 741:30
2006 251 671:30
2007 223 742:30
2008 134 700:00
2009 83 629:45
2010 356 570:15
2011 782 520:15
2012 135 543:15
2013 272 410:30
2014 204 500:15
2015 108 683:45
2016 80 688:45
2017 143 671:00
2018 133 739:00
2019 174 731:30
 
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