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 0 68:45
1961 0 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 0 36:15
1970 0 50:30
1971 0 38:15
1972 6 45:45
1973 0 27:15
1974 0 0:00
1975 0 55:15
1976 8 48:00
1977 0 43:15
1978 1 45:00
1979 0 52:00
1980 8 51:45
1981 4 62:00
1982 48 177:30
1983 0 4:15
1984 5 194:00
1985 24 253:45
1986 13 292:00
1987 28 282:15
1988 2 286:00
1989 30 239:42
1990 6 134:45
1991 0 127:30
1992 30 116:30
1993 13 117:45
1994 4 64:30
1995 0 90:30
1996 2 102:10
1997 3 89:00
1998 0 49:45
1999 18 162:00
2000 1 123:30
2001 26 185:15
2002 0 143:15
2003 0 85:30
2004 10 106:30
2005 8 112:30
2006 0 60:00
2007 3 70:30
2008 2 103:51
2009 0 78:30
2010 6 76:30
2011 34 214:15
2012 51 225:50
2013 14 180:30
2014 54 206:35
2015 0 77:15
2016 15 101:05
2017 16 55:40
2018 1 66:31
2019 59 90:45
2020 144 77:49
 
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