Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 22 64:45
1955 1 81:45
1956 30 80:00
1957 12 99:45
1958 4 84:00
1959 270 77:00
1960 19 68:45
1961 239 84:30
1962 33 69:30
1963 53 53:30
1964 18 53:15
1965 24 68:30
1966 111 48:45
1967 28 31:00
1968 7 33:15
1969 2 36:15
1970 16 50:30
1971 94 38:15
1972 70 45:45
1973 14 27:15
1974 0 0:00
1975 2 55:15
1976 85 48:00
1977 31 43:15
1978 27 45:00
1979 32 52:00
1980 32 51:45
1981 222 62:00
1982 245 177:30
1983 9 4:15
1984 110 194:00
1985 252 253:45
1986 619 292:00
1987 416 282:15
1988 1471 226:15
1989 279 165:45
1990 297 134:45
1991 650 127:30
1992 152 114:30
1993 603 117:45
1994 470 64:30
1995 1381 90:30
1996 694 102:10
1997 189 89:00
1998 103 49:45
1999 264 162:00
2000 514 123:30
2001 1067 159:00
2002 112 111:45
2003 182 68:30
2004 471 106:30
2005 1107 112:30
2006 254 60:00
2007 631 70:30
2008 921 103:51
2009 69 78:30
2010 1767 76:30
2011 1108 214:15
2012 639 225:50
2013 1648 180:30
2014 2828 206:35
2015 117 77:15
2016 1885 101:05
2017 162 55:40
2018 2053 66:31
2019 3601 90:45
 
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