Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2000 15 93:00
2001 25 287:00
2002 29 316:00
2003 114 382:42
2004 77 342:37
2005 54 554:39
2006 224 657:43
2007 452 725:19
2008 294 1488:17
2009 166 799:54
2010 285 900:27
2011 243 834:45
2012 434 840:54
2013 190 890:41
2014 310 864:15
2015 389 727:16
2016 204 659:29
2017 186 777:46
2018 151 766:48
2019 115 683:31
2020 53 839:09
 
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