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 0 19:00
2001 0 594:30
2002 0 0:00
2005 1 77:15
2006 0 32:05
2007 7 88:45
2008 5 100:00
2009 0 52:20
2010 4 48:05
2011 9 88:24
2012 0 36:20
2013 2 37:30
2014 7 30:40
2015 3 44:40
2016 38 163:00
2017 38 179:29
2018 50 380:50
2019 95 344:15
2020 152 447:51
2021 145 462:39
2022 217 482:00
 
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