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 3 80:00
1957 1 99:45
1958 0 84:00
1959 3 77:00
1960 1 68:45
1961 1 84:30
1962 2 69:30
1963 0 53:30
1964 1 53:15
1965 0 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 1 45:45
1973 1 27:15
1974 0 0:00
1975 0 55:15
1976 1 48:00
1977 0 43:15
1978 3 45:00
1979 0 52:00
1980 2 51:45
1981 2 62:00
1982 2 177:30
1983 0 4:15
1984 4 194:00
1985 7 253:45
1986 9 292:00
1987 3 282:15
1988 25 226:15
1989 7 165:45
1990 7 134:45
1991 4 127:30
1992 17 114:30
1993 8 117:45
1994 2 64:30
1995 11 90:30
1996 28 102:10
1997 5 89:00
1998 6 49:45
1999 5 162:00
2000 1 123:30
2001 26 159:00
2002 11 111:45
2003 8 68:30
2004 16 106:30
2005 33 112:30
2006 7 60:00
2007 20 70:30
2008 54 103:51
2009 42 78:30
2010 37 76:30
2011 65 214:15
2012 132 225:50
2013 7 180:30
2014 29 206:35
2015 33 77:15
2016 6 101:05
2017 29 55:40
2018 3 66:31
2019 17 90:45
 
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