Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2006 277 61:32
2007 650 211:28
2008 153 460:04
2009 894 365:00
2010 7176 637:04
2011 7494 348:08
2012 1761 333:29
2013 4704 281:38
2014 3021 156:47
2015 217 117:20
2016 1391 142:02
2017 3137 179:22
2018 1295 222:16
2019 3745 251:51
2020 3907 326:27
2021 5225 172:06
2022 0 72:35
 
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