Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2006 10 23:40
2007 22 71:05
2008 65 94:25
2009 28 91:45
2010 30 159:55
2011 50 208:42
2012 76 196:45
2013 68 239:26
2014 28 218:15
2015 11 145:35
2016 41 217:52
2017 57 191:09
2018 64 243:43
2019 16 191:56
2020 28 108:23
2021 77 156:10
2022 41 112:25
 
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