Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2006 22646 61:32
2007 26272 211:28
2008 45204 460:04
2009 40406 365:00
2010 60871 637:04
2011 90372 348:08
2012 55638 333:29
2013 65046 281:38
2014 31555 156:47
2015 3476 117:20
2016 11892 142:02
2017 28593 179:22
2018 31865 222:16
2019 29931 251:51
2020 15201 326:27
2021 16926 172:06
2022 645 72:35
 
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