Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 0 66:45
1998 50 46:00
1999 0 79:15
2000 77 114:15
2001 15 119:45
2002 159 311:15
2003 185 433:15
2004 434 539:15
2005 195 741:30
2006 156 671:30
2007 101 742:30
2008 83 700:00
2009 202 629:45
2010 70 570:15
2011 88 520:15
2012 157 543:15
2013 83 410:30
2014 151 500:15
2015 53 683:45
2016 204 688:45
2017 348 671:00
2018 82 739:00
2019 87 642:45
 
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