Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
2010 163 192:15
2011 170 548:35
2012 855 598:30
2013 238 613:57
2014 393 701:15
2015 623 626:35
2016 201 715:25
2017 910 674:15
2018 205 645:36
2019 1919 642:45
2020 56 188:20
2021 180 381:00
2022 12 97:55
2023 96 190:15
 
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