Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 0 51:15
1954 0 64:45
1955 0 81:45
1956 5 80:00
1957 0 99:45
1958 1 84:00
1959 0 77:00
1960 0 68:45
1961 0 84:30
1962 0 69:30
1963 0 53:30
1964 1 53:15
1965 6 68:30
1966 1 48:45
1967 3 31:00
1968 0 33:15
1969 0 36:15
1970 0 50:30
1971 0 38:15
1972 6 45:45
1973 0 27:15
1974 0 0:00
1975 4 55:15
1976 0 48:00
1977 0 43:15
1978 0 45:00
1979 9 52:00
1980 20 51:45
1981 20 62:00
1982 36 177:30
1983 8 4:15
1984 46 194:00
1985 49 253:45
1986 127 292:00
1987 433 282:15
1988 135 161:15
1989 73 133:30
1990 132 116:15
1991 104 105:30
1992 119 97:30
1993 74 117:45
1994 29 64:30
1995 42 90:30
1996 45 102:10
1997 49 89:00
1998 23 49:45
1999 80 162:00
2000 157 123:30
2001 49 144:15
2002 43 71:30
2003 34 54:15
2004 15 101:45
2005 46 112:30
2006 28 60:00
2007 35 70:30
2008 68 103:51
2009 109 78:30
2010 89 76:30
2011 250 214:15
2012 256 225:50
2013 70 180:30
2014 272 206:35
2015 37 77:15
2016 187 101:05
2017 102 55:40
2018 13 66:31
2019 86 90:45
 
Partners