Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites
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Year Totals Observation hours
1997 138 63:45
1998 8 48:00
1999 5 79:45
2000 36 114:15
2001 23 130:55
2002 108 311:10
2003 230 434:00
2004 177 539:15
2005 203 741:30
2006 209 671:30
2007 33 742:30
2008 68 700:00
2009 240 629:45
2010 210 570:15
2011 169 520:15
2012 157 543:15
2013 178 410:30
2014 159 500:15
2015 254 683:45
2016 245 688:45
2017 300 671:00
2018 361 739:00
2019 403 737:00
2020 340 795:00
2021 248 787:15
2022 346 648:40
2023 113 293:12
 
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