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 10 80:00
1957 70 99:45
1958 0 84:00
1959 0 77:00
1960 0 68:45
1961 50 84:30
1962 0 69:30
1963 0 53:30
1964 0 53:15
1965 3 68:30
1966 4 48:45
1967 20 31:00
1968 5 33:15
1969 30 36:15
1970 1 50:30
1971 0 38:15
1972 3 45:45
1973 0 27:15
1974 0 0:00
1975 3 55:15
1976 11 48:00
1977 0 43:15
1978 0 45:00
1979 15 52:00
1980 73 51:45
1981 35 62:00
1982 183 177:30
1983 0 4:15
1984 143 194:00
1985 36 253:45
1986 19 292:00
1987 33 282:15
1988 33 161:15
1989 17 133:30
1990 56 116:15
1991 36 105:30
1992 4 97:30
1993 1 117:45
1994 0 64:30
1995 1 90:30
1996 0 102:10
1997 4 89:00
1998 0 49:45
1999 19 162:00
2000 3 123:30
2001 45 144:15
2002 26 71:30
2003 0 54:15
2004 17 101:45
2005 18 112:30
2006 0 60:00
2007 3 70:30
2008 27 103:51
2009 0 78:30
2010 12 76:30
2011 118 214:15
2012 70 225:50
2013 187 180:30
2014 44 206:35
2015 3 77:15
2016 10 101:05
2017 0 55:40
2018 1 66:31
2019 6 90:45
 
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