Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2006 1 61:32
2007 28 211:28
2008 35 460:04
2009 65 365:00
2010 1782 637:04
2011 32 348:08
2012 246 333:29
2013 94 281:38
2014 5 156:47
2015 6 117:20
2016 10 142:02
2017 2 179:22
2018 3 222:16
2019 30 251:51
2020 9 326:27
2021 46 172:06
2022 0 72:35
 
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