Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2000 7 93:00
2001 20 287:00
2002 13 316:00
2003 36 382:42
2004 18 342:37
2005 59 554:39
2006 11 657:43
2007 70 725:19
2008 69 1488:17
2009 47 799:54
2010 46 900:27
2011 20 834:45
2012 35 840:54
2013 24 890:41
2014 39 864:15
2015 34 727:16
2016 35 659:29
2017 11 777:46
2018 52 766:48
2019 16 683:31
2020 18 839:09
 
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