Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1972 34 31:00
1973 2 18:15
1974 1 7:45
1975 0 18:30
1976 4 66:30
1977 2 23:45
1978 41 116:45
1979 26 71:45
1980 100 109:00
1981 14 78:00
1982 5 39:00
1983 3 71:00
1984 7 30:15
1985 19 98:00
1986 4 41:30
1987 0 42:15
1988 0 55:00
1989 0 47:15
1990 1 33:00
1991 0 18:00
1992 0 28:30
1993 27 25:45
1994 0 40:00
1995 0 15:15
1996 0 5:00
1997 0 26:30
1998 0 20:00
1999 0 26:45
2000 1 27:30
2001 0 23:00
2002 0 26:55
2003 1 37:45
2004 0 30:10
2005 12 34:00
2006 0 41:33
2007 0 83:14
2008 1 56:33
2009 1 76:07
2010 0 52:50
2011 21 80:30
2012 76 94:05
2013 17 66:27
2014 2 41:10
2015 1 49:05
2016 0 19:00
2017 7 123:39
2018 2 89:34
2019 2 98:07
2020 2 108:43
2021 0 1:30
 
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