Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
1953 156 51:15
1954 169 64:45
1955 1288 81:45
1956 950 80:00
1957 2432 99:45
1958 1094 84:00
1959 1033 77:00
1960 2639 68:45
1961 1698 84:30
1962 458 69:30
1963 479 53:30
1964 294 53:15
1965 662 68:30
1966 1456 48:45
1967 716 31:00
1968 250 33:15
1969 110 36:15
1970 262 50:30
1971 694 38:15
1972 397 45:45
1973 100 27:15
1974 0 0:00
1975 104 55:15
1976 1610 48:00
1977 1823 43:15
1978 649 45:00
1979 544 52:00
1980 268 51:45
1981 616 62:00
1982 907 177:30
1983 273 4:15
1984 528 194:00
1985 267 253:45
1986 1094 292:00
1987 930 287:15
1988 1023 376:10
1989 951 239:42
1990 1345 134:45
1991 558 128:00
1992 193 116:30
1993 457 117:45
1994 283 67:00
1995 1921 90:30
1996 1566 102:10
1997 490 89:00
1998 186 49:45
1999 195 162:00
2000 316 123:30
2001 320 185:15
2002 101 143:15
2003 76 85:30
2004 310 106:30
2005 528 112:30
2006 188 60:00
2007 258 70:30
2008 137 103:51
2009 89 78:30
2010 140 76:30
2011 336 214:15
2012 435 225:50
2013 44 180:30
2014 412 206:35
2015 117 77:15
2016 85 101:05
2017 197 55:40
2018 194 66:31
2019 60 90:45
2020 23 172:21
2021 30 109:30
 
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