Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2000 8 93:00
2001 16 287:00
2002 124 316:00
2003 117 382:42
2004 169 342:37
2005 168 554:39
2006 120 657:43
2007 213 725:19
2008 244 1488:17
2009 112 799:54
2010 71 900:27
2011 146 834:45
2012 138 840:54
2013 82 890:41
2014 160 864:15
2015 34 727:16
2016 52 659:29
2017 168 777:46
2018 115 766:48
2019 17 683:31
2020 17 839:09
 
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