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 3 99:45
1958 51 84:00
1959 5 77:00
1960 0 68:45
1961 1 84:30
1962 0 69:30
1963 0 53:30
1964 0 53:15
1965 0 68:30
1966 2 48:45
1967 0 31:00
1968 1 33:15
1969 18 36:15
1970 22 50:30
1971 0 38:15
1972 0 45:45
1973 0 27:15
1974 0 0:00
1975 2 55:15
1976 15 48:00
1977 10 43:15
1978 2 45:00
1979 0 52:00
1980 28 51:45
1981 5 62:00
1982 3 177:30
1983 0 4:15
1984 73 194:00
1985 51 253:45
1986 97 292:00
1987 205 282:15
1988 48 161:15
1989 16 133:30
1990 65 116:15
1991 91 105:30
1992 62 97:30
1993 32 117:45
1994 39 64:30
1995 43 90:30
1996 32 102:10
1997 31 89:00
1998 15 49:45
1999 67 162:00
2000 9 123:30
2001 175 144:15
2002 27 71:30
2003 29 54:15
2004 133 101:45
2005 61 112:30
2006 16 60:00
2007 20 70:30
2008 13 103:51
2009 32 78:30
2010 18 76:30
2011 145 214:15
2012 67 225:50
2013 526 180:30
2014 93 206:35
2015 49 77:15
2016 18 101:05
2017 18 55:40
2018 5 66:31
2019 7 90:45
 
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