Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2006 0 23:40
2007 1396 71:05
2008 27693 94:25
2009 10295 91:45
2010 19069 159:55
2011 27114 208:42
2012 39285 196:45
2013 34231 239:26
2014 44000 218:15
2015 3899 145:35
2016 16861 217:52
2017 61912 191:09
2018 35843 243:43
2019 6474 191:56
2020 31593 108:23
2021 62173 156:10
2022 23695 112:25
 
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