Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 10 51:15
1954 3 64:45
1955 14 81:45
1956 13 80:00
1957 17 99:45
1958 15 84:00
1959 8 77:00
1960 5 68:45
1961 9 84:30
1962 2 69:30
1963 2 53:30
1964 14 53:15
1965 12 68:30
1966 2 48:45
1967 10 31:00
1968 16 33:15
1969 8 36:15
1970 2 50:30
1971 0 38:15
1972 21 45:45
1973 3 27:15
1974 0 0:00
1975 2 55:15
1976 4 48:00
1977 11 43:15
1978 4 45:00
1979 0 52:00
1980 1 51:45
1981 3 62:00
1982 1 177:30
1983 0 4:15
1984 7 194:00
1985 5 253:45
1986 26 292:00
1987 20 282:15
1988 3 176:15
1989 28 133:30
1990 10 116:15
1991 6 127:30
1992 16 114:30
1993 8 117:45
1994 22 64:30
1995 34 90:30
1996 29 102:10
1997 54 89:00
1998 35 49:45
1999 54 162:00
2000 42 123:30
2001 73 146:30
2002 14 71:30
2003 9 54:15
2004 92 106:30
2005 78 112:30
2006 38 60:00
2007 77 70:30
2008 131 103:51
2009 59 78:30
2010 37 76:30
2011 426 214:15
2012 190 225:50
2013 124 180:30
2014 225 206:35
2015 76 77:15
2016 169 101:05
2017 132 55:40
2018 177 66:31
2019 157 90:45
 
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