Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 21 63:45
1998 4 48:00
1999 8 79:45
2000 17 114:15
2001 4 130:55
2002 8 311:10
2003 68 434:00
2004 109 539:15
2005 72 741:30
2006 24 671:30
2007 56 742:30
2008 38 700:00
2009 131 629:45
2010 67 570:15
2011 97 520:15
2012 126 543:15
2013 46 410:30
2014 153 500:15
2015 36 683:45
2016 96 688:45
2017 60 671:00
2018 122 739:00
2019 165 737:00
2020 105 780:30
 
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