Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 5 66:45
1998 12 46:00
1999 23 79:15
2000 44 114:15
2001 30 119:45
2002 72 311:15
2003 110 433:15
2004 210 539:15
2005 177 741:30
2006 139 671:30
2007 296 742:30
2008 239 700:00
2009 218 629:45
2010 164 570:15
2011 757 520:15
2012 222 543:15
2013 143 410:30
2014 306 500:15
2015 364 683:45
2016 353 688:45
2017 260 671:00
2018 355 739:00
2019 689 731:30
 
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