Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2000 58 93:00
2001 251 287:00
2002 51 316:00
2003 600 382:42
2004 119 342:37
2005 789 554:39
2006 2467 657:43
2007 2563 725:19
2008 1845 1488:17
2009 1048 799:54
2010 3199 900:27
2011 563 834:45
2012 721 840:54
2013 370 890:41
2014 862 864:15
2015 490 727:16
2016 46 659:29
2017 405 777:46
2018 6375 766:48
2019 214 683:31
2020 1564 839:09
2021 22647 921:00
2022 1266 853:07
 
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