Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2000 0 93:00
2001 0 287:00
2002 4 316:00
2003 0 382:42
2004 0 342:37
2005 1 554:39
2006 1 657:43
2007 1 725:19
2008 2 1488:17
2009 5 799:54
2010 11 900:27
2011 2 834:45
2012 11 840:54
2013 2 890:41
2014 14 864:15
2015 0 727:16
2016 2 659:29
2017 5 777:46
2018 7 766:48
2019 9 683:31
2020 4 839:09
2021 11 722:09
 
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