Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 2 51:15
1954 0 64:45
1955 0 81:45
1956 45 80:00
1957 0 99:45
1958 9 84:00
1959 41 77:00
1960 18 68:45
1961 9 84:30
1962 21 69:30
1963 39 53:30
1964 9 53:15
1965 43 68:30
1966 143 48:45
1967 45 31:00
1968 24 33:15
1969 10 36:15
1970 1 50:30
1971 28 38:15
1972 85 45:45
1973 17 27:15
1974 0 0:00
1975 13 55:15
1976 31 48:00
1977 17 43:15
1978 13 45:00
1979 21 52:00
1980 19 51:45
1981 27 62:00
1982 63 177:30
1983 11 4:15
1984 153 194:00
1985 129 253:45
1986 1082 292:00
1987 959 282:15
1988 998 276:00
1989 1320 239:42
1990 943 134:45
1991 558 127:30
1992 486 116:30
1993 645 117:45
1994 457 64:30
1995 1172 90:30
1996 608 102:10
1997 355 89:00
1998 252 49:45
1999 504 162:00
2000 795 123:30
2001 1078 185:15
2002 256 143:15
2003 437 85:30
2004 685 106:30
2005 1153 112:30
2006 435 60:00
2007 329 70:30
2008 230 103:51
2009 550 78:30
2010 262 76:30
2011 858 214:15
2012 274 225:50
2013 1112 180:30
2014 1616 206:35
2015 564 77:15
2016 416 101:05
2017 80 55:40
2018 690 66:31
2019 417 90:45
2020 38 71:49
 
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