Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 3991 63:45
1998 1704 48:00
1999 826 79:45
2000 621 114:15
2001 6649 130:55
2002 8901 311:10
2003 14059 434:00
2004 11753 539:15
2005 16886 741:30
2006 15460 671:30
2007 16521 742:30
2008 24886 700:00
2009 16478 629:45
2010 15030 570:15
2011 13453 520:15
2012 20953 543:15
2013 10979 410:30
2014 13933 500:15
2015 8007 683:45
2016 11967 688:45
2017 20000 671:00
2018 20626 739:00
2019 21779 737:00
2020 4149 496:06
 
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