Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Don't use roostmigration

Year Totals Observation hours
1997 9 39:30
1999 0 19:00
2001 60 594:30
2002 0 0:00
2005 12 77:15
2006 9 32:05
2007 11 88:45
2008 37 100:00
2009 3 52:20
2010 7 48:05
2011 14 88:24
2012 14 36:20
2013 5 37:30
2014 9 30:40
2015 3 44:40
2016 59 163:00
2017 71 179:29
2018 115 380:50
2019 118 344:15
2020 142 447:51
2021 160 462:39
2022 193 482:00
 
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