Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
1953 32062 51:15
1954 52900 64:45
1955 67258 81:45
1956 22686 80:00
1957 43858 99:45
1958 41533 84:00
1959 38010 77:00
1960 16681 68:45
1961 81504 84:30
1962 16233 69:30
1963 37297 53:30
1964 22721 53:15
1965 9500 68:30
1966 49401 48:45
1967 16340 31:00
1968 12591 33:15
1969 821 36:15
1970 1988 50:30
1971 9309 38:15
1972 4563 45:45
1973 2656 27:15
1974 0 0:00
1975 2279 55:15
1976 28251 48:00
1977 17332 43:15
1978 16558 45:00
1979 12785 52:00
1980 13409 51:45
1981 9990 62:00
1982 17004 177:30
1983 441 4:15
1984 53334 194:00
1985 40254 253:45
1986 35542 292:00
1987 45073 282:15
1988 18002 226:15
1989 28459 233:42
1990 51859 134:45
1991 7086 127:30
1992 5796 116:30
1993 16887 117:45
1994 11006 64:30
1995 24346 90:30
1996 26679 102:10
1997 12856 89:00
1998 20025 49:45
1999 28342 162:00
2000 27694 123:30
2001 57854 185:15
2002 10939 143:15
2003 8169 85:30
2004 21761 106:30
2005 69219 112:30
2006 24078 60:00
2007 42036 70:30
2008 40352 103:51
2009 20529 78:30
2010 19015 76:30
2011 99556 214:15
2012 38628 225:50
2013 48659 180:30
2014 101706 206:35
2015 17427 77:15
2016 17245 101:05
2017 17509 55:40
2018 80780 66:31
2019 43186 90:45
2020 19 69:29
 
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