Graph

Country
Migration site
Species
Period    
Sex
 Age
 Plumage
Present
Favourites

Year Totals Observation hours
1953 64471 51:15
1954 117044 64:45
1955 46989 81:45
1956 49655 80:00
1957 108503 99:45
1958 201185 84:00
1959 113001 77:00
1960 60354 68:45
1961 108947 84:30
1962 24677 69:30
1963 75528 53:30
1964 92958 53:15
1965 35536 68:30
1966 110245 48:45
1967 88954 31:00
1968 35530 33:15
1969 26893 36:15
1970 45155 50:30
1971 45849 38:15
1972 31854 45:45
1973 60143 27:15
1974 0 0:00
1975 61323 55:15
1976 67714 48:00
1977 72383 43:15
1978 90129 45:00
1979 41122 52:00
1980 76283 51:45
1981 61001 62:00
1982 108673 177:30
1983 3726 4:15
1984 205051 194:00
1985 71949 253:45
1986 142396 292:00
1987 99786 287:15
1988 48524 376:10
1989 119057 239:42
1990 101612 134:45
1991 73550 128:00
1992 101907 116:30
1993 48243 117:45
1994 32377 67:00
1995 71275 90:30
1996 109020 102:10
1997 111373 89:00
1998 78378 49:45
1999 125207 162:00
2000 105325 123:30
2001 170816 185:15
2002 41432 143:15
2003 23811 85:30
2004 99896 106:30
2005 129171 112:30
2006 41649 60:00
2007 55960 70:30
2008 81416 103:51
2009 70630 78:30
2010 160627 76:30
2011 158580 214:15
2012 168283 225:50
2013 56040 180:30
2014 217947 206:35
2015 61822 77:15
2016 46817 101:05
2017 75541 55:40
2018 33990 66:31
2019 64793 90:45
2020 94494 172:21
2021 19453 17:00
 
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