Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2006 4444 61:32
2007 8748 211:28
2008 34375 460:04
2009 20266 365:00
2010 25407 637:04
2011 17257 348:08
2012 15285 333:29
2013 22383 281:38
2014 10993 156:47
2015 2865 117:20
2016 1743 142:02
2017 4644 179:22
2018 12766 222:16
2019 3003 251:51
2020 6675 326:27
2021 3233 172:06
2022 291 72:35
 
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