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 0 99:45
1958 0 84:00
1959 0 77:00
1960 8 68:45
1961 1 84:30
1962 0 69:30
1963 0 53:30
1964 0 53:15
1965 0 68:30
1966 0 48:45
1967 0 31:00
1968 0 33:15
1969 1 36:15
1970 1 50:30
1971 0 38:15
1972 0 45:45
1973 1 27:15
1974 0 0:00
1975 1 55:15
1976 0 48:00
1977 0 43:15
1978 0 45:00
1979 0 52:00
1980 0 51:45
1981 1 62:00
1982 19 177:30
1983 0 4:15
1984 15 194:00
1985 30 253:45
1986 15 292:00
1987 40 282:15
1988 18 161:15
1989 9 133:30
1990 20 116:15
1991 37 105:30
1992 4 97:30
1993 12 117:45
1994 6 64:30
1995 0 90:30
1996 4 102:10
1997 6 89:00
1998 0 49:45
1999 8 162:00
2000 7 123:30
2001 11 144:15
2002 4 71:30
2003 22 54:15
2004 5 101:45
2005 1 112:30
2006 4 60:00
2007 2 70:30
2008 7 103:51
2009 26 78:30
2010 2 76:30
2011 30 214:15
2012 37 225:50
2013 110 180:30
2014 119 206:35
2015 3 77:15
2016 16 101:05
2017 129 55:40
2018 15 66:31
2019 9 90:45
 
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