Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2000 0 93:00
2001 122 287:00
2002 102 316:00
2003 159 382:42
2004 260 342:37
2005 163 554:39
2006 567 657:43
2007 5918 725:19
2008 1151 1488:17
2009 290 799:54
2010 493 900:27
2011 420 834:45
2012 748 840:54
2013 2085 890:41
2014 1515 864:15
2015 1164 727:16
2016 5339 659:29
2017 11050 777:46
2018 7430 766:48
2019 14594 683:31
2020 2507 839:09
2021 10283 921:00
2022 3805 853:07
 
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