Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 29 66:45
1998 24 46:00
1999 36 79:15
2000 35 114:15
2001 93 119:45
2002 242 311:15
2003 390 433:15
2004 163 539:15
2005 396 741:30
2006 276 671:30
2007 272 742:30
2008 197 700:00
2009 144 629:45
2010 482 570:15
2011 213 520:15
2012 363 543:15
2013 201 410:30
2014 566 500:15
2015 390 683:45
2016 274 688:45
2017 446 671:00
2018 415 739:00
2019 36 445:30
 
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