Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 33 66:45
1998 41 46:00
1999 21 79:15
2000 91 114:15
2001 225 119:45
2002 306 311:15
2003 439 433:15
2004 640 539:15
2005 900 741:30
2006 553 671:30
2007 445 742:30
2008 693 700:00
2009 740 629:45
2010 620 570:15
2011 559 520:15
2012 476 543:15
2013 718 410:30
2014 623 500:15
2015 527 683:45
2016 516 688:45
2017 556 671:00
2018 712 739:00
2019 470 721:15
 
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