Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 2 51:15
1954 1 64:45
1955 1 81:45
1956 4 80:00
1957 0 99:45
1958 3 84:00
1959 0 77:00
1960 1 68:45
1961 10 84:30
1962 4 69:30
1963 3 53:30
1964 2 53:15
1965 20 68:30
1966 4 48:45
1967 4 31:00
1968 7 33:15
1969 6 36:15
1970 3 50:30
1971 10 38:15
1972 12 45:45
1973 12 27:15
1974 0 0:00
1975 6 55:15
1976 10 48:00
1977 9 43:15
1978 2 45:00
1979 9 52:00
1980 3 51:45
1981 12 62:00
1982 13 177:30
1983 0 4:15
1984 29 194:00
1985 20 253:45
1986 7 292:00
1987 10 282:15
1988 12 276:00
1989 9 239:42
1990 17 134:45
1991 6 127:30
1992 7 116:30
1993 7 117:45
1994 2 64:30
1995 2 90:30
1996 11 102:10
1997 3 89:00
1998 0 49:45
1999 6 162:00
2000 22 123:30
2001 9 185:15
2002 6 143:15
2003 4 85:30
2004 7 106:30
2005 2 112:30
2006 6 60:00
2007 9 70:30
2008 36 103:51
2009 9 78:30
2010 14 76:30
2011 68 214:15
2012 67 225:50
2013 31 180:30
2014 54 206:35
2015 11 77:15
2016 29 101:05
2017 24 55:40
2018 15 66:31
2019 35 90:45
2020 36 71:49
 
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