Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 0 64:45
1955 1017 81:45
1956 1 80:00
1957 191 99:45
1958 0 84:00
1959 4 77:00
1960 0 68:45
1961 6 84:30
1962 0 69:30
1963 186 53:30
1964 9 53:15
1965 7 68:30
1966 0 48:45
1967 0 31:00
1968 2 33:15
1969 2 36:15
1970 0 50:30
1971 0 38:15
1972 41 45:45
1973 0 27:15
1974 0 0:00
1975 1 55:15
1976 0 48:00
1977 1 43:15
1978 0 45:00
1979 3 52:00
1980 0 51:45
1981 0 62:00
1982 3 177:30
1983 2 4:15
1984 12 194:00
1985 2 253:45
1986 26 292:00
1987 4 282:15
1988 0 226:15
1989 1 165:45
1990 4 134:45
1991 3 127:30
1992 1 114:30
1993 0 117:45
1994 12 64:30
1995 0 90:30
1996 369 102:10
1997 0 89:00
1998 0 49:45
1999 1 162:00
2000 0 123:30
2001 7 159:00
2002 16 92:30
2003 2 68:30
2004 28 106:30
2005 3 112:30
2006 0 60:00
2007 7 70:30
2008 20 103:51
2009 29 78:30
2010 87 76:30
2011 25 214:15
2012 120 225:50
2013 7 180:30
2014 48 206:35
2015 0 77:15
2016 2 101:05
2017 1 55:40
2018 0 66:31
2019 539 90:45
 
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