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 1 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 1 31:00
1968 0 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 1 62:00
1982 18 177:30
1983 2 4:15
1984 38 194:00
1985 25 253:45
1986 43 292:00
1987 18 282:15
1988 28 226:15
1989 60 233:42
1990 33 134:45
1991 23 127:30
1992 30 116:30
1993 39 117:45
1994 55 64:30
1995 102 90:30
1996 69 102:10
1997 30 89:00
1998 29 49:45
1999 61 162:00
2000 52 123:30
2001 93 185:15
2002 59 143:15
2003 37 85:30
2004 83 106:30
2005 188 112:30
2006 83 60:00
2007 117 70:30
2008 126 103:51
2009 50 78:30
2010 64 76:30
2011 88 214:15
2012 52 225:50
2013 83 180:30
2014 211 206:35
2015 42 77:15
2016 196 101:05
2017 54 55:40
2018 110 66:31
2019 269 90:45
2020 3 71:49
 
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