Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2000 73 93:00
2001 223 287:00
2002 113 316:00
2003 385 382:42
2004 447 342:37
2005 1214 554:39
2006 1041 657:43
2007 1549 725:19
2008 3700 1488:17
2009 1592 799:54
2010 1113 900:27
2011 1209 834:45
2012 1069 840:54
2013 631 890:41
2014 1252 864:15
2015 663 727:16
2016 585 659:29
2017 1160 777:46
2018 1223 766:48
2019 947 683:31
2020 879 839:09
2021 855 921:00
2022 769 853:07
 
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