Graph

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

Year Totals Observation hours
1997 0 39:30
1999 1 19:00
2001 17 594:30
2002 0 0:00
2005 3 77:15
2006 1 32:05
2007 4 88:45
2008 4 100:00
2009 1 52:20
2010 2 48:05
2011 2 88:24
2012 0 36:20
2013 1 37:30
2014 0 30:40
2015 4 44:40
2016 13 163:00
2017 10 179:29
2018 8 380:50
2019 7 344:15
2020 6 447:51
2021 7 462:39
2022 5 482:00
 
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