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 0 80:00
1957 2 99:45
1958 0 84:00
1959 0 77:00
1960 0 68:45
1961 2 84:30
1962 0 69:30
1963 0 53:30
1964 0 53:15
1965 2 68:30
1966 1 48:45
1967 0 31:00
1968 1 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 0 48:00
1977 0 43:15
1978 0 45:00
1979 0 52:00
1980 0 51:45
1981 3 62:00
1982 5 177:30
1983 0 4:15
1984 13 194:00
1985 1 253:45
1986 5 292:00
1987 2 282:15
1988 5 176:15
1989 0 133:30
1990 0 116:15
1991 5 127:30
1992 3 114:30
1993 1 117:45
1994 0 64:30
1995 1 90:30
1996 4 102:10
1997 2 89:00
1998 3 49:45
1999 5 162:00
2000 7 123:30
2001 4 146:30
2002 7 71:30
2003 4 54:15
2004 3 106:30
2005 6 112:30
2006 1 60:00
2007 1 70:30
2008 10 103:51
2009 3 78:30
2010 8 76:30
2011 45 214:15
2012 26 225:50
2013 14 180:30
2014 54 206:35
2015 6 77:15
2016 14 101:05
2017 9 55:40
2018 8 66:31
2019 19 90:45
 
Partners