Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 49 66:45
1998 71 46:00
1999 23 79:15
2000 80 114:15
2001 261 119:45
2002 250 311:15
2003 140 433:15
2004 144 539:15
2005 393 741:30
2006 621 671:30
2007 497 742:30
2008 470 700:00
2009 785 629:45
2010 701 570:15
2011 935 520:15
2012 688 543:15
2013 518 410:30
2014 580 500:15
2015 600 683:45
2016 744 688:45
2017 802 671:00
2018 573 739:00
2019 205 425:53
 
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