Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
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Year Totals Observation hours
1997 49 39:30
1999 33 19:00
2001 997 594:30
2002 0 0:00
2005 49 77:15
2006 19 32:05
2007 17 88:45
2008 94 100:00
2009 18 52:20
2010 8 48:05
2011 5 88:24
2012 3 36:20
2013 15 37:30
2014 4 30:40
2015 9 44:40
2016 14 163:00
2017 81 179:29
2018 159 380:50
2019 82 344:15
2020 249 447:51
2021 70 462:39
2022 105 482:00
2023 1 192:05
 
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