Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
2006 0 61:32
2007 0 211:28
2008 0 460:04
2009 0 365:00
2010 0 637:04
2011 2 348:08
2012 3 333:29
2013 4 281:38
2014 2 156:47
2015 2 117:20
2016 0 142:02
2017 0 179:22
2018 1 222:16
2019 1 251:51
2020 6 326:27
2021 0 103:46
 
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