Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
1997 1 39:30
1999 3 19:00
2001 2211 594:30
2002 0 0:00
2005 204 77:15
2006 18 32:05
2007 132 88:45
2008 72 100:00
2009 2 52:20
2010 121 48:05
2011 129 88:24
2012 23 36:20
2013 19 37:30
2014 25 30:40
2015 30 44:40
2016 490 163:00
2017 715 179:29
2018 675 380:50
2019 2400 344:15
2020 1246 447:51
2021 4904 462:39
2022 3867 482:00
 
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