Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 2 63:45
1998 0 48:00
1999 1 79:45
2000 0 114:15
2001 0 130:55
2002 1 311:10
2003 0 434:00
2004 1 539:15
2005 0 741:30
2006 1 671:30
2007 3 742:30
2008 6 700:00
2009 5 629:45
2010 2 570:15
2011 5 520:15
2012 15 543:15
2013 5 410:30
2014 4 500:15
2015 8 683:45
2016 29 688:45
2017 8 671:00
2018 5 739:00
2019 15 737:00
2020 21 718:06
 
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