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 1 80:00
1957 4 99:45
1958 7 84:00
1959 1 77:00
1960 3 68:45
1961 1 84:30
1962 47 69:30
1963 0 53:30
1964 0 53:15
1965 0 68:30
1966 1 48:45
1967 1 31:00
1968 0 33:15
1969 0 36:15
1970 4 50:30
1971 0 38:15
1972 2 45:45
1973 6 27:15
1974 0 0:00
1975 1 55:15
1976 0 48:00
1977 0 43:15
1978 0 45:00
1979 3 52:00
1980 1 51:45
1981 6 62:00
1982 18 177:30
1983 0 4:15
1984 1 194:00
1985 3 253:45
1986 37 292:00
1987 35 282:15
1988 24 161:15
1989 32 133:30
1990 0 116:15
1991 1 105:30
1992 4 97:30
1993 3 117:45
1994 1 64:30
1995 2 90:30
1996 12 102:10
1997 6 89:00
1998 14 49:45
1999 8 162:00
2000 8 123:30
2001 0 144:15
2002 0 71:30
2003 2 54:15
2004 15 101:45
2005 2 112:30
2006 0 60:00
2007 2 70:30
2008 4 103:51
2009 2 78:30
2010 2 76:30
2011 24 214:15
2012 2 225:50
2013 2 180:30
2014 10 206:35
2015 0 77:15
2016 0 101:05
2017 0 55:40
2018 0 66:31
2019 1 90:45
 
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