Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
1997 0 39:30
1999 39 19:00
2001 2569 594:30
2002 0 0:00
2005 191 77:15
2006 121 32:05
2007 709 88:45
2008 2082 100:00
2009 80 52:20
2010 64 48:05
2011 904 88:24
2012 526 36:20
2013 665 37:30
2014 67 30:40
2015 338 44:40
2016 1132 163:00
2017 1132 179:29
2018 4868 380:50
2019 3656 344:15
2020 3189 447:51
2021 6405 462:39
2022 5159 482:00
 
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