Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2000 31 93:00
2001 89 287:00
2002 89 316:00
2003 157 382:42
2004 120 342:37
2005 237 554:39
2006 454 657:43
2007 510 725:19
2008 822 1488:17
2009 347 799:54
2010 625 900:27
2011 446 834:45
2012 565 840:54
2013 515 890:41
2014 586 864:15
2015 329 727:16
2016 238 659:29
2017 382 777:46
2018 553 766:48
2019 511 683:31
2020 398 648:57
 
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