Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
1997 1202 63:45
1998 1920 48:00
1999 187 79:45
2000 990 114:15
2001 7534 130:55
2002 4182 311:10
2003 24034 434:00
2004 17539 539:15
2005 12595 741:30
2006 9812 671:30
2007 10049 742:30
2008 20889 700:00
2009 12791 629:45
2010 10799 570:15
2011 10697 520:15
2012 10838 543:15
2013 7368 410:30
2014 18242 500:15
2015 8883 683:45
2016 9241 688:45
2017 12154 671:00
2018 9866 739:00
2019 89366 737:00
2020 21389 795:00
2021 10988 337:36
 
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