Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 5 66:45
1998 2 46:00
1999 29 79:15
2000 19 114:15
2001 5 119:45
2002 44 311:15
2003 29 433:15
2004 52 539:15
2005 69 741:30
2006 111 671:30
2007 108 742:30
2008 162 700:00
2009 70 629:45
2010 129 570:15
2011 124 520:15
2012 102 543:15
2013 110 410:30
2014 138 500:15
2015 178 683:45
2016 175 688:45
2017 166 671:00
2018 170 739:00
2019 261 630:45
 
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