Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2000 74 93:00
2001 85 287:00
2002 173 316:00
2003 104 382:42
2004 21 342:37
2005 172 554:39
2006 37 657:43
2007 513 725:19
2008 486 1488:17
2009 316 799:54
2010 331 900:27
2011 166 834:45
2012 558 840:54
2013 333 890:41
2014 522 864:15
2015 336 727:16
2016 145 659:29
2017 400 777:46
2018 288 766:48
2019 1247 683:31
2020 311 839:09
2021 2961 921:00
2022 846 853:07
 
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