Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 125 66:45
1998 66 46:00
1999 39 79:15
2000 30 114:15
2001 168 119:45
2002 183 311:15
2003 90 433:15
2004 330 539:15
2005 297 741:30
2006 200 671:30
2007 199 742:30
2008 181 700:00
2009 724 629:45
2010 397 570:15
2011 387 520:15
2012 313 543:15
2013 218 410:30
2014 675 500:15
2015 181 683:45
2016 134 688:45
2017 252 671:00
2018 104 739:00
2019 65 539:30
 
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