Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 77 66:45
1998 107 46:00
1999 40 79:15
2000 54 114:15
2001 157 119:45
2002 130 311:15
2003 1395 433:15
2004 442 539:15
2005 3772 741:30
2006 450 671:30
2007 360 742:30
2008 411 700:00
2009 141 629:45
2010 2066 570:15
2011 528 520:15
2012 676 543:15
2013 428 410:30
2014 221 500:15
2015 443 683:45
2016 150 688:45
2017 260 671:00
2018 5263 739:00
2019 20 630:45
 
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