Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2000 0 93:00
2001 5 287:00
2002 2 316:00
2003 9 382:42
2004 17 342:37
2005 2 554:39
2006 4 657:43
2007 3 725:19
2008 13 1488:17
2009 12 799:54
2010 13 900:27
2011 7 834:45
2012 8 840:54
2013 6 890:41
2014 6 864:15
2015 9 727:16
2016 14 659:29
2017 7 777:46
2018 5 766:48
2019 16 683:31
2020 18 839:09
2021 21 921:00
 
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