Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 11 51:15
1954 5 64:45
1955 71 81:45
1956 28 80:00
1957 64 99:45
1958 3 84:00
1959 1 77:00
1960 3 68:45
1961 2 84:30
1962 6 69:30
1963 8 53:30
1964 7 53:15
1965 17 68:30
1966 5 48:45
1967 0 31:00
1968 0 33:15
1969 0 36:15
1970 1 50:30
1971 3 38:15
1972 2 45:45
1973 0 27:15
1974 0 0:00
1975 0 55:15
1976 1 48:00
1977 14 43:15
1978 3 45:00
1979 6 52:00
1980 8 51:45
1981 23 62:00
1982 28 177:30
1983 5 4:15
1984 92 194:00
1985 121 253:45
1986 133 292:00
1987 58 282:15
1988 232 226:15
1989 465 233:42
1990 454 134:45
1991 150 127:30
1992 192 116:30
1993 432 117:45
1994 69 64:30
1995 168 90:30
1996 282 102:10
1997 794 89:00
1998 202 49:45
1999 284 162:00
2000 392 123:30
2001 202 185:15
2002 207 143:15
2003 37 85:30
2004 187 106:30
2005 136 112:30
2006 25 60:00
2007 249 70:30
2008 145 103:51
2009 23 78:30
2010 116 76:30
2011 392 214:15
2012 167 225:50
2013 173 180:30
2014 496 206:35
2015 29 77:15
2016 47 101:05
2017 16 55:40
2018 106 66:31
2019 111 90:45
2020 9 69:29
 
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