Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 1 51:15
1954 21 64:45
1955 7 81:45
1956 7 80:00
1957 8 99:45
1958 50 84:00
1959 138 77:00
1960 24 68:45
1961 64 84:30
1962 33 69:30
1963 97 53:30
1964 75 53:15
1965 24 68:30
1966 21 48:45
1967 85 31:00
1968 78 33:15
1969 16 36:15
1970 30 50:30
1971 30 38:15
1972 363 45:45
1973 8 27:15
1974 0 0:00
1975 35 55:15
1976 20 48:00
1977 47 43:15
1978 40 45:00
1979 21 52:00
1980 57 51:45
1981 128 62:00
1982 137 177:30
1983 8 4:15
1984 53 194:00
1985 30 253:45
1986 64 292:00
1987 89 282:15
1988 60 226:15
1989 47 165:45
1990 80 134:45
1991 23 127:30
1992 56 114:30
1993 30 117:45
1994 25 64:30
1995 32 90:30
1996 44 102:10
1997 49 89:00
1998 49 49:45
1999 119 162:00
2000 96 123:30
2001 136 159:00
2002 23 111:45
2003 6 68:30
2004 61 106:30
2005 131 112:30
2006 48 60:00
2007 55 70:30
2008 126 103:51
2009 72 78:30
2010 47 76:30
2011 147 214:15
2012 157 225:50
2013 109 180:30
2014 804 206:35
2015 63 77:15
2016 121 101:05
2017 70 55:40
2018 60 66:31
2019 93 90:45
 
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