Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 152 63:45
1998 35 48:00
1999 62 79:45
2000 35 114:15
2001 77 130:55
2002 117 311:10
2003 138 434:00
2004 149 539:15
2005 163 741:30
2006 132 671:30
2007 155 742:30
2008 56 700:00
2009 37 629:45
2010 85 570:15
2011 124 520:15
2012 65 543:15
2013 80 410:30
2014 79 500:15
2015 41 683:45
2016 60 688:45
2017 77 671:00
2018 51 739:00
2019 44 737:00
2020 43 795:00
2021 9 474:35
 
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