Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2000 1552 93:00
2001 7434 287:00
2002 6976 316:00
2003 9762 382:42
2004 12806 342:37
2005 26532 554:39
2006 53459 657:43
2007 30152 725:19
2008 162632 1488:17
2009 26056 799:54
2010 82929 900:27
2011 38639 834:45
2012 126123 840:54
2013 106837 890:41
2014 129282 864:15
2015 50954 727:16
2016 16250 659:29
2017 142367 777:46
2018 129286 766:48
2019 92274 683:31
2020 130900 839:09
2021 224188 921:00
2022 119648 853:07
 
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