Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 2 64:45
1955 6 81:45
1956 19 80:00
1957 0 99:45
1958 6 84:00
1959 0 77:00
1960 1 68:45
1961 7 84:30
1962 0 69:30
1963 0 53:30
1964 1 53:15
1965 1 68:30
1966 6 48:45
1967 0 31:00
1968 0 33:15
1969 1 36:15
1970 2 50:30
1971 0 38:15
1972 2 45:45
1973 1 27:15
1974 0 0:00
1975 1 55:15
1976 4 48:00
1977 0 43:15
1978 4 45:00
1979 1 52:00
1980 2 51:45
1981 12 62:00
1982 29 177:30
1983 0 4:15
1984 43 194:00
1985 122 253:45
1986 13 292:00
1987 6 282:15
1988 32 161:15
1989 8 133:30
1990 17 116:15
1991 9 105:30
1992 11 97:30
1993 6 117:45
1994 0 64:30
1995 14 90:30
1996 5 102:10
1997 2 89:00
1998 0 49:45
1999 29 162:00
2000 7 123:30
2001 4 144:15
2002 1 71:30
2003 0 54:15
2004 5 101:45
2005 1 112:30
2006 2 60:00
2007 6 70:30
2008 0 103:51
2009 44 78:30
2010 0 76:30
2011 19 214:15
2012 52 225:50
2013 175 180:30
2014 14 206:35
2015 14 77:15
2016 13 101:05
2017 151 55:40
2018 0 66:31
2019 28 90:45
 
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