Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 0 63:45
1998 1 48:00
1999 0 79:45
2000 0 114:15
2001 0 130:55
2002 0 311:10
2003 3 434:00
2004 3 539:15
2005 4 741:30
2006 6 671:30
2007 15 742:30
2008 4 700:00
2009 5 629:45
2010 4 570:15
2011 9 520:15
2012 0 543:15
2013 13 410:30
2014 7 500:15
2015 9 683:45
2016 13 688:45
2017 5 671:00
2018 7 739:00
2019 5 737:00
2020 10 703:01
 
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