Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 2 64:45
1955 2 81:45
1956 35 80:00
1957 6 99:45
1958 0 84:00
1959 11 77:00
1960 3 68:45
1961 9 84:30
1962 8 69:30
1963 0 53:30
1964 1 53:15
1965 2 68:30
1966 4 48:45
1967 1 31:00
1968 2 33:15
1969 1 36:15
1970 1 50:30
1971 0 38:15
1972 4 45:45
1973 0 27:15
1974 0 0:00
1975 1 55:15
1976 7 48:00
1977 2 43:15
1978 2 45:00
1979 7 52:00
1980 19 51:45
1981 69 62:00
1982 72 177:30
1983 0 4:15
1984 50 194:00
1985 106 253:45
1986 79 292:00
1987 246 287:15
1988 148 376:10
1989 120 239:42
1990 168 134:45
1991 68 128:00
1992 89 116:30
1993 39 117:45
1994 48 67:00
1995 33 90:30
1996 25 102:10
1997 16 89:00
1998 11 49:45
1999 95 162:00
2000 50 123:30
2001 76 185:15
2002 54 143:15
2003 35 85:30
2004 71 106:30
2005 54 112:30
2006 46 60:00
2007 62 70:30
2008 93 103:51
2009 21 78:30
2010 66 76:30
2011 113 214:15
2012 161 225:50
2013 200 180:30
2014 148 206:35
2015 56 77:15
2016 53 101:05
2017 28 55:40
2018 40 66:31
2019 103 90:45
2020 312 172:21
2021 57 109:30
 
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