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 4 19:00
2001 420 594:30
2002 0 0:00
2005 56 77:15
2006 15 32:05
2007 38 88:45
2008 38 100:00
2009 15 52:20
2010 18 48:05
2011 22 88:24
2012 20 36:20
2013 72 37:30
2014 15 30:40
2015 62 44:40
2016 41 163:00
2017 72 179:29
2018 88 380:50
2019 152 344:15
2020 411 447:51
2021 236 462:39
2022 406 482:00
 
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