Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1953 147 51:15
1954 0 64:45
1955 18 81:45
1956 31 80:00
1957 172 99:45
1958 26 84:00
1959 600 77:00
1960 423 68:45
1961 306 84:30
1962 340 69:30
1963 61 53:30
1964 280 53:15
1965 102 68:30
1966 155 48:45
1967 45 31:00
1968 138 33:15
1969 69 36:15
1970 339 50:30
1971 359 38:15
1972 157 45:45
1973 22 27:15
1974 0 0:00
1975 60 55:15
1976 246 48:00
1977 186 43:15
1978 162 45:00
1979 86 52:00
1980 138 51:45
1981 115 62:00
1982 354 177:30
1983 23 4:15
1984 917 194:00
1985 190 253:45
1986 873 292:00
1987 246 282:15
1988 428 226:15
1989 543 233:42
1990 1822 134:45
1991 647 127:30
1992 337 116:30
1993 185 117:45
1994 684 64:30
1995 1009 90:30
1996 842 102:10
1997 444 89:00
1998 428 49:45
1999 741 162:00
2000 197 123:30
2001 207 185:15
2002 78 143:15
2003 101 85:30
2004 371 106:30
2005 473 112:30
2006 120 60:00
2007 417 70:30
2008 587 103:51
2009 118 78:30
2010 128 76:30
2011 965 214:15
2012 677 225:50
2013 652 180:30
2014 745 206:35
2015 381 77:15
2016 135 101:05
2017 173 55:40
2018 463 66:31
2019 439 90:45
2020 22 71:49
 
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