Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 105 51:15
1954 111 64:45
1955 70 81:45
1956 29 80:00
1957 5 99:45
1958 25 84:00
1959 20 77:00
1960 14 68:45
1961 0 84:30
1962 6 69:30
1963 0 53:30
1964 0 53:15
1965 0 68:30
1966 0 48:45
1967 2 31:00
1968 0 33:15
1969 0 36:15
1970 3 50:30
1971 2 38:15
1972 0 45:45
1973 50 27:15
1974 0 0:00
1975 0 55:15
1976 31 48:00
1977 21 43:15
1978 68 45:00
1979 35 52:00
1980 69 51:45
1981 121 62:00
1982 450 177:30
1983 0 4:15
1984 605 194:00
1985 1452 253:45
1986 13 292:00
1987 25 282:15
1988 0 286:00
1989 0 239:42
1990 14 134:45
1991 0 127:30
1992 0 116:30
1993 0 117:45
1994 0 64:30
1995 0 90:30
1996 0 102:10
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 96 78:30
2010 30 76:30
2011 17 214:15
2012 210 225:50
2013 16 180:30
2014 87 206:35
2015 0 77:15
2016 0 101:05
2017 0 55:40
2018 0 66:31
2019 0 90:45
2020 300 75:19
 
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