Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2000 23 93:00
2001 41 287:00
2002 64 316:00
2003 36 382:42
2004 18 342:37
2005 56 554:39
2006 44 657:43
2007 38 725:19
2008 29 1488:17
2009 7 799:54
2010 26 900:27
2011 18 834:45
2012 18 840:54
2013 18 890:41
2014 11 864:15
2015 18 727:16
2016 10 659:29
2017 18 777:46
2018 7 766:48
2019 20 683:31
2020 17 839:09
 
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