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 2 68:45
1961 4 84:30
1962 0 69:30
1963 5 53:30
1964 0 53:15
1965 2 68:30
1966 0 48:45
1967 1 31:00
1968 0 33:15
1969 1 36:15
1970 0 50:30
1971 0 38:15
1972 0 45:45
1973 0 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 0 62:00
1982 0 177:30
1983 0 4:15
1984 0 194:00
1985 4 253:45
1986 56 292:00
1987 14 282:15
1988 2 161:15
1989 19 133:30
1990 5 116:15
1991 0 105:30
1992 29 97:30
1993 19 117:45
1994 0 64:30
1995 0 90:30
1996 0 102:10
1997 1 89:00
1998 1 49:45
1999 12 162:00
2000 12 123:30
2001 17 144:15
2002 2 71:30
2003 0 54:15
2004 8 101:45
2005 5 112:30
2006 4 60:00
2007 1 70:30
2008 14 103:51
2009 98 78:30
2010 15 76:30
2011 120 214:15
2012 49 225:50
2013 52 180:30
2014 63 206:35
2015 3 77:15
2016 8 101:05
2017 36 55:40
2018 1 66:31
2019 20 90:45
 
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