Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 0 66:45
1998 20 46:00
1999 1 79:15
2000 2 114:15
2001 10 119:45
2002 12 311:15
2003 16 433:15
2004 2 539:15
2005 570 741:30
2006 79 671:30
2007 101 742:30
2008 498 700:00
2009 4 629:45
2010 55 570:15
2011 20 520:15
2012 10 543:15
2013 66 410:30
2014 16 500:15
2015 6 683:45
2016 7 688:45
2017 938 671:00
2018 436 739:00
2019 5 717:00
 
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