Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1997 74 39:30
1999 41 19:00
2001 51483 594:30
2002 0 0:00
2005 5564 77:15
2006 4536 32:05
2007 2955 88:45
2008 6152 100:00
2009 1093 52:20
2010 6486 48:05
2011 4985 88:24
2012 2210 36:20
2013 8073 37:30
2014 4420 30:40
2015 2441 44:40
2016 6928 163:00
2017 24995 179:29
2018 56382 380:50
2019 91827 344:15
2020 99244 447:51
2021 131288 462:39
 
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