Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 25 63:45
1998 55 48:00
1999 27 79:45
2000 32 114:15
2001 58 130:55
2002 178 311:10
2003 205 434:00
2004 419 539:15
2005 580 741:30
2006 494 671:30
2007 375 742:30
2008 510 700:00
2009 380 629:45
2010 448 570:15
2011 363 520:15
2012 372 543:15
2013 453 410:30
2014 159 500:15
2015 173 683:45
2016 380 688:45
2017 173 671:00
2018 93 739:00
2019 89 737:00
2020 7 795:00
2021 398 474:35
 
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