Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 1 64:45
1955 2 81:45
1956 2 80:00
1957 3 99:45
1958 3 84:00
1959 7 77:00
1960 6 68:45
1961 1 84:30
1962 3 69:30
1963 2 53:30
1964 2 53:15
1965 1 68:30
1966 0 48:45
1967 1 31:00
1968 0 33:15
1969 0 36:15
1970 0 50:30
1971 0 38:15
1972 0 45:45
1973 0 27:15
1974 0 0:00
1975 2 55:15
1976 1 48:00
1977 2 43:15
1978 0 45:00
1979 0 52:00
1980 0 51:45
1981 4 62:00
1982 3 177:30
1983 0 4:15
1984 4 194:00
1985 8 253:45
1986 7 292:00
1987 2 282:15
1988 6 161:15
1989 1 133:30
1990 5 116:15
1991 2 105:30
1992 2 97:30
1993 6 117:45
1994 3 64:30
1995 2 90:30
1996 4 102:10
1997 4 89:00
1998 1 49:45
1999 2 162:00
2000 3 123:30
2001 9 144:15
2002 2 71:30
2003 3 54:15
2004 2 101:45
2005 4 112:30
2006 1 60:00
2007 10 70:30
2008 2 103:51
2009 2 78:30
2010 3 76:30
2011 12 214:15
2012 6 225:50
2013 4 180:30
2014 9 206:35
2015 1 77:15
2016 8 101:05
2017 3 55:40
2018 1 66:31
2019 12 90:45
 
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