Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
1997 0 39:30
1999 0 19:00
2001 438 594:30
2002 0 0:00
2005 49 77:15
2006 56 32:05
2007 120 88:45
2008 149 100:00
2009 10 52:20
2010 96 48:05
2011 41 88:24
2012 1 36:20
2013 33 37:30
2014 8 30:40
2015 51 44:40
2016 169 163:00
2017 157 179:29
2018 549 380:50
2019 717 344:15
2020 1084 447:51
2021 723 462:39
2022 1111 482:00
 
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