Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 13 51:15
1954 12 64:45
1955 27 81:45
1956 14 80:00
1957 13 99:45
1958 3 84:00
1959 10 77:00
1960 10 68:45
1961 5 84:30
1962 0 69:30
1963 3 53:30
1964 2 53:15
1965 8 68:30
1966 6 48:45
1967 1 31:00
1968 7 33:15
1969 0 36:15
1970 5 50:30
1971 2 38:15
1972 1 45:45
1973 13 27:15
1974 0 0:00
1975 8 55:15
1976 0 48:00
1977 9 43:15
1978 13 45:00
1979 21 52:00
1980 36 51:45
1981 52 62:00
1982 37 177:30
1983 1 4:15
1984 98 194:00
1985 76 253:45
1986 85 292:00
1987 68 282:15
1988 50 276:00
1989 44 239:42
1990 39 134:45
1991 78 127:30
1992 53 116:30
1993 39 117:45
1994 36 64:30
1995 39 90:30
1996 78 102:10
1997 155 89:00
1998 43 49:45
1999 164 162:00
2000 31 123:30
2001 70 185:15
2002 27 143:15
2003 33 85:30
2004 66 106:30
2005 35 112:30
2006 23 60:00
2007 64 70:30
2008 96 103:51
2009 38 78:30
2010 56 76:30
2011 260 214:15
2012 79 225:50
2013 59 180:30
2014 140 206:35
2015 34 77:15
2016 35 101:05
2017 13 55:40
2018 25 66:31
2019 95 90:45
2020 15 71:49
 
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