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 0 68:45
1961 0 84:30
1962 0 69:30
1963 0 53:30
1964 0 53:15
1965 10 68:30
1966 0 48:45
1967 0 31:00
1968 0 33:15
1969 0 36:15
1970 0 50:30
1971 0 38:15
1972 0 45:45
1973 0 27:15
1974 0 0:00
1975 4 55:15
1976 232 48:00
1977 19 43:15
1978 1 45:00
1979 78 52:00
1980 36 51:45
1981 21 62:00
1982 147 177:30
1983 0 4:15
1984 159 194:00
1985 1121 253:45
1986 0 292:00
1987 11 287:15
1988 0 376:10
1989 7 239:42
1990 0 134:45
1991 51 128:00
1992 0 116:30
1993 0 117:45
1994 0 67:00
1995 0 90:30
1996 2 102:10
1997 0 89:00
1998 0 49:45
1999 0 162:00
2000 0 123:30
2001 0 185:15
2002 0 143:15
2003 0 85:30
2004 0 106:30
2005 0 112:30
2006 0 60:00
2007 0 70:30
2008 0 103:51
2009 11 78:30
2010 22 76:30
2011 3 214:15
2012 0 225:50
2013 0 180:30
2014 0 206:35
2015 1 77:15
2016 0 101:05
2017 0 55:40
2018 0 66:31
2019 0 90:45
2020 21 172:21
2021 3 142:00
 
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