Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 0 27:20
1985 0 29:00
1986 1 69:40
1987 0 47:00
1988 0 17:30
1989 1 45:00
1990 0 35:00
1991 0 48:28
1992 0 45:00
1993 1 51:30
1994 2 27:30
1995 1 50:00
1996 1 49:15
1997 0 34:50
1998 0 50:00
1999 2 57:20
2000 0 42:30
2001 0 69:35
2002 4 76:40
2003 0 108:30
2004 4 111:45
2005 5 145:21
2006 1 152:17
2007 2 187:59
2008 2 132:42
2009 0 75:32
2010 3 236:16
2011 10 281:19
2012 8 394:00
2013 0 408:08
2014 4 481:30
2015 4 400:00
2016 4 467:00
2017 3 490:30
2018 4 442:30
2019 3 431:54
2020 0 102:00
 
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