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 2 80:00
1957 9 99:45
1958 2 84:00
1959 1 77:00
1960 2 68:45
1961 1 84:30
1962 6 69:30
1963 1 53:30
1964 3 53:15
1965 4 68:30
1966 37 48:45
1967 6 31:00
1968 8 33:15
1969 5 36:15
1970 1 50:30
1971 3 38:15
1972 2 45:45
1973 3 27:15
1974 0 0:00
1975 2 55:15
1976 10 48:00
1977 5 43:15
1978 9 45:00
1979 11 52:00
1980 9 51:45
1981 46 62:00
1982 126 177:30
1983 7 4:15
1984 58 194:00
1985 60 253:45
1986 158 292:00
1987 218 282:15
1988 522 276:00
1989 286 239:42
1990 192 134:45
1991 158 127:30
1992 526 116:30
1993 121 117:45
1994 51 64:30
1995 109 90:30
1996 23 102:10
1997 39 89:00
1998 35 49:45
1999 84 162:00
2000 191 123:30
2001 164 185:15
2002 75 143:15
2003 113 85:30
2004 108 106:30
2005 116 112:30
2006 95 60:00
2007 83 70:30
2008 135 103:51
2009 65 78:30
2010 72 76:30
2011 385 214:15
2012 382 225:50
2013 178 180:30
2014 442 206:35
2015 66 77:15
2016 429 101:05
2017 127 55:40
2018 59 66:31
2019 83 90:45
2020 4 75:19
 
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