Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 0 27:20
1985 2 29:00
1986 3 69:40
1987 1 47:00
1988 1 17:30
1989 2 45:00
1990 1 35:30
1991 1 48:28
1992 0 45:00
1993 1 51:30
1994 0 27:30
1995 3 50:00
1996 1 49:15
1997 0 34:50
1998 0 50:00
1999 3 57:20
2000 0 42:30
2001 3 69:35
2002 3 76:40
2003 5 108:30
2004 3 111:45
2005 10 145:21
2006 1 152:17
2007 13 187:59
2008 15 132:42
2009 0 75:32
2010 12 236:16
2011 22 281:19
2012 17 394:00
2013 26 408:08
2014 14 481:30
2015 8 400:00
2016 8 467:00
2017 16 490:30
2018 34 442:30
2019 31 431:54
2020 28 451:00
2021 1 190:30
 
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