Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites
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Year Totals Observation hours
1997 26 63:45
1998 23 48:00
1999 68 79:45
2000 38 114:15
2001 102 130:55
2002 105 311:10
2003 162 434:00
2004 150 539:15
2005 236 741:30
2006 173 671:30
2007 127 742:30
2008 189 700:00
2009 158 629:45
2010 283 570:15
2011 301 520:15
2012 162 543:15
2013 198 410:30
2014 157 500:15
2015 112 683:45
2016 115 688:45
2017 123 671:00
2018 182 739:00
2019 127 737:00
2020 117 795:00
2021 105 787:15
2022 81 648:40
2023 0 9:00
 
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