Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2000 6 93:00
2001 49 287:00
2002 25 316:00
2003 31 382:42
2004 93 342:37
2005 117 554:39
2006 82 657:43
2007 156 725:19
2008 115 1488:17
2009 113 799:54
2010 150 900:27
2011 103 834:45
2012 162 840:54
2013 104 890:41
2014 219 864:15
2015 197 727:16
2016 156 659:29
2017 92 777:46
2018 105 766:48
2019 31 683:31
2020 40 839:09
 
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