Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 4 63:45
1998 2 48:00
1999 16 79:45
2000 2 114:15
2001 32 130:55
2002 28 311:10
2003 26 434:00
2004 69 539:15
2005 154 741:30
2006 307 671:30
2007 116 742:30
2008 141 700:00
2009 147 629:45
2010 55 570:15
2011 184 520:15
2012 154 543:15
2013 64 410:30
2014 343 500:15
2015 147 683:45
2016 55 688:45
2017 38 671:00
2018 145 739:00
2019 89 737:00
2020 71 718:06
 
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