Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 0 64:45
1955 0 81:45
1956 6 80:00
1957 2 99:45
1958 3 84:00
1959 0 77:00
1960 0 68:45
1961 4 84:30
1962 0 69:30
1963 0 53:30
1964 2 53:15
1965 0 68:30
1966 17 48:45
1967 1 31:00
1968 1 33:15
1969 6 36:15
1970 22 50:30
1971 4 38:15
1972 6 45:45
1973 1 27:15
1974 0 0:00
1975 5 55:15
1976 0 48:00
1977 0 43:15
1978 0 45:00
1979 0 52:00
1980 0 51:45
1981 0 62:00
1982 0 177:30
1983 0 4:15
1984 0 194:00
1985 0 253:45
1986 0 292:00
1987 1 287:15
1988 0 376:10
1989 0 239:42
1990 0 134:45
1991 0 128:00
1992 3 116:30
1993 0 117:45
1994 0 67:00
1995 3 90:30
1996 1 102:10
1997 1 89:00
1998 0 49:45
1999 0 162:00
2000 0 123:30
2001 0 185:15
2002 0 143:15
2003 0 85:30
2004 0 106:30
2005 0 112:30
2006 0 60:00
2007 0 70:30
2008 0 103:51
2009 0 78:30
2010 0 76:30
2011 0 214:15
2012 0 225:50
2013 0 180:30
2014 0 206:35
2015 0 77:15
2016 0 101:05
2017 0 55:40
2018 0 66:31
2019 0 90:45
2020 0 152:21
 
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