Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites
Don't use roostmigration

Year Totals Observation hours
1997 0 63:45
1998 0 48:00
1999 1 79:45
2000 0 114:15
2001 1 130:55
2002 1 311:10
2003 1 434:00
2004 0 539:15
2005 3 741:30
2006 2 671:30
2007 0 742:30
2008 6 700:00
2009 4 629:45
2010 4 570:15
2011 6 520:15
2012 3 543:15
2013 9 410:30
2014 3 500:15
2015 6 683:45
2016 6 688:45
2017 4 671:00
2018 52 739:00
2019 10 737:00
2020 9 795:00
2021 15 787:15
2022 8 648:40
2023 7 293:12
 
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