Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2000 36 93:00
2001 443 287:00
2002 49 316:00
2003 336 382:42
2004 135 342:37
2005 346 554:39
2006 1112 657:43
2007 1857 725:19
2008 7027 1488:17
2009 4220 799:54
2010 3766 900:27
2011 1599 834:45
2012 3071 840:54
2013 5973 890:41
2014 1923 864:15
2015 1384 727:16
2016 793 659:29
2017 5276 777:46
2018 2702 766:48
2019 3068 683:31
2020 1924 839:09
2021 940 921:00
2022 3080 853:07
 
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