Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 6 51:15
1954 0 64:45
1955 4 81:45
1956 0 80:00
1957 21 99:45
1958 0 84:00
1959 0 77:00
1960 5 68:45
1961 15 84:30
1962 0 69:30
1963 2 53:30
1964 0 53:15
1965 0 68:30
1966 4 48:45
1967 1 31:00
1968 0 33:15
1969 2 36:15
1970 0 50:30
1971 0 38:15
1972 1 45:45
1973 0 27:15
1974 0 0:00
1975 0 55:15
1976 23 48:00
1977 1 43:15
1978 0 45:00
1979 0 52:00
1980 27 51:45
1981 33 62:00
1982 45 177:30
1983 0 4:15
1984 101 194:00
1985 113 253:45
1986 43 292:00
1987 58 282:15
1988 80 276:00
1989 41 239:42
1990 79 134:45
1991 28 127:30
1992 36 116:30
1993 13 117:45
1994 17 64:30
1995 13 90:30
1996 24 102:10
1997 13 89:00
1998 2 49:45
1999 19 162:00
2000 28 123:30
2001 56 185:15
2002 7 143:15
2003 14 85:30
2004 24 106:30
2005 31 112:30
2006 19 60:00
2007 2 70:30
2008 13 103:51
2009 6 78:30
2010 10 76:30
2011 59 214:15
2012 68 225:50
2013 89 180:30
2014 31 206:35
2015 12 77:15
2016 37 101:05
2017 85 55:40
2018 8 66:31
2019 39 90:45
2020 47 71:49
 
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