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 129 594:30
2002 0 0:00
2005 412 77:15
2006 199 32:05
2007 132 88:45
2008 195 100:00
2009 153 52:20
2010 76 48:05
2011 118 88:24
2012 5 36:20
2013 123 37:30
2014 59 30:40
2015 207 44:40
2016 164 163:00
2017 232 179:29
2018 922 380:50
2019 1016 344:15
2020 1512 447:51
2021 1403 462:39
2022 862 482:00
 
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