Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites
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Year Totals Observation hours
2006 4 61:32
2007 24 211:28
2008 27 460:04
2009 43 365:00
2010 92 637:04
2011 57 348:08
2012 70 333:29
2013 31 281:38
2014 39 156:47
2015 12 117:20
2016 24 142:02
2017 35 179:22
2018 34 222:16
2019 16 251:51
2020 18 326:27
2021 27 172:06
2022 3 72:35
 
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