Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 5 64:45
1955 0 81:45
1956 2 80:00
1957 18 99:45
1958 8 84:00
1959 0 77:00
1960 3 68:45
1961 16 84:30
1962 0 69:30
1963 4 53:30
1964 1 53:15
1965 0 68:30
1966 0 48:45
1967 0 31:00
1968 5 33:15
1969 2 36:15
1970 15 50:30
1971 12 38:15
1972 2 45:45
1973 6 27:15
1974 0 0:00
1975 3 55:15
1976 3 48:00
1977 16 43:15
1978 2 45:00
1979 5 52:00
1980 56 51:45
1981 20 62:00
1982 269 177:30
1983 0 4:15
1984 285 194:00
1985 814 253:45
1986 122 292:00
1987 227 282:15
1988 56 161:15
1989 73 133:30
1990 342 116:15
1991 66 105:30
1992 114 97:30
1993 35 117:45
1994 2 64:30
1995 10 90:30
1996 2 102:10
1997 2 89:00
1998 0 49:45
1999 49 162:00
2000 34 123:30
2001 42 144:15
2002 31 71:30
2003 0 54:15
2004 16 101:45
2005 7 112:30
2006 2 60:00
2007 6 70:30
2008 10 103:51
2009 118 78:30
2010 28 76:30
2011 109 214:15
2012 134 225:50
2013 391 180:30
2014 201 206:35
2015 25 77:15
2016 53 101:05
2017 22 55:40
2018 13 66:31
2019 32 90:45
 
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