Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 2 27:20
1985 1 29:00
1986 5 69:40
1987 5 47:00
1988 2 17:30
1989 4 45:00
1990 0 35:00
1991 1 48:28
1992 0 45:00
1993 1 51:30
1994 1 27:30
1995 1 50:00
1996 1 49:15
1997 0 34:50
1998 1 50:00
1999 3 57:20
2000 1 42:30
2001 2 69:35
2002 1 76:40
2003 0 108:30
2004 1 111:45
2005 2 145:21
2006 5 152:17
2007 1 187:59
2008 0 132:42
2009 1 75:32
2010 4 236:16
2011 3 281:19
2012 8 394:00
2013 4 408:08
2014 4 481:30
2015 3 400:00
2016 2 467:00
2017 1 490:30
2018 1 442:30
2019 0 431:54
2020 4 451:00
 
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