Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2006 628 23:40
2007 561 71:05
2008 2176 94:25
2009 2760 91:45
2010 1511 159:55
2011 4420 208:42
2012 6426 196:45
2013 4929 239:26
2014 6546 218:15
2015 1295 145:35
2016 6492 217:52
2017 2732 191:09
2018 6724 243:43
2019 830 191:56
2020 1677 108:23
2021 4066 156:10
2022 1147 112:25
 
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