Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 1 64:45
1955 0 81:45
1956 8 80:00
1957 3 99:45
1958 0 84:00
1959 0 77:00
1960 12 68:45
1961 12 84:30
1962 1 69:30
1963 4 53:30
1964 0 53:15
1965 1 68:30
1966 1 48:45
1967 1 31:00
1968 2 33:15
1969 0 36:15
1970 0 50:30
1971 0 38:15
1972 4 45:45
1973 0 27:15
1974 0 0:00
1975 11 55:15
1976 51 48:00
1977 6 43:15
1978 5 45:00
1979 7 52:00
1980 6 51:45
1981 17 62:00
1982 95 177:30
1983 0 4:15
1984 130 194:00
1985 159 253:45
1986 2 292:00
1987 0 282:15
1988 1 161:15
1989 0 133:30
1990 4 116:15
1991 0 105:30
1992 2 97:30
1993 2 117:45
1994 0 64:30
1995 0 90:30
1996 0 102:10
1997 0 89:00
1998 0 49:45
1999 0 162:00
2000 3 123:30
2001 0 144:15
2002 0 71:30
2003 1 54:15
2004 0 101:45
2005 0 112:30
2006 1 60:00
2007 0 70:30
2008 0 103:51
2009 0 78:30
2010 0 76:30
2011 5 214:15
2012 1 225:50
2013 0 180:30
2014 1 206:35
2015 0 77:15
2016 1 101:05
2017 0 55:40
2018 0 66:31
2019 1 90:45
 
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