Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2000 272 93:00
2001 478 287:00
2002 851 316:00
2003 1604 382:42
2004 3412 342:37
2005 6590 554:39
2006 18280 657:43
2007 7628 725:19
2008 22289 1488:17
2009 3830 799:54
2010 1918 900:27
2011 6022 834:45
2012 4107 840:54
2013 3480 890:41
2014 17126 864:15
2015 571 727:16
2016 363 659:29
2017 5193 777:46
2018 7623 766:48
2019 12263 683:31
2020 36305 839:09
2021 19806 921:00
2022 19595 853:07
 
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