Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
2000 2 93:00
2001 6 287:00
2002 5 316:00
2003 7 382:42
2004 14 342:37
2005 23 554:39
2006 4 657:43
2007 81 725:19
2008 959 1488:17
2009 42 799:54
2010 103 900:27
2011 37 834:45
2012 192 840:54
2013 52 890:41
2014 195 864:15
2015 81 727:16
2016 3 659:29
2017 98 777:46
2018 24 766:48
2019 70 683:31
2020 23 839:09
2021 105 921:00
 
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