Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1972 17 31:00
1973 3 18:15
1974 0 7:45
1975 3 18:30
1976 0 66:30
1977 13 23:45
1978 82 116:45
1979 8 71:45
1980 23 109:00
1981 5 78:00
1982 0 39:00
1983 2 71:00
1984 1 30:15
1985 25 98:00
1986 3 41:30
1987 0 42:15
1988 3 55:00
1989 1 47:15
1990 2 33:00
1991 0 18:00
1992 0 28:30
1993 0 25:45
1994 0 40:00
1995 0 15:15
1996 0 5:00
1997 0 26:30
1998 1 20:00
1999 0 26:45
2000 0 27:30
2001 0 23:00
2002 1 26:55
2003 5 37:45
2004 0 30:10
2005 0 34:00
2006 10 41:33
2007 13 83:14
2008 0 56:33
2009 1 76:07
2010 1 52:50
2011 9 80:30
2012 18 94:05
2013 1 66:27
2014 0 41:10
2015 0 49:05
2016 0 19:00
2017 2 123:39
2018 4 89:34
2019 1 98:07
2020 8 108:43
2021 0 4:45
 
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