Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1960 0 0:00
1961 0 0:00
1962 0 0:00
1963 0 0:00
1964 0 0:00
1965 0 0:00
1966 0 0:00
1967 0 0:00
1968 0 0:00
1969 0 0:00
1970 0 0:00
1971 0 0:00
1972 0 0:00
1973 0 0:00
1974 0 0:00
1975 0 0:00
1976 0 0:00
1977 41 791:25
1978 31 820:52
1979 14 934:10
1980 30 731:36
1981 25 944:01
1982 16 768:05
1983 15 673:25
1984 15 682:07
1985 16 775:03
1986 47 933:53
1987 77 1120:12
1988 76 1184:32
1989 126 1293:12
1990 104 944:40
1991 59 858:50
1992 65 759:26
1993 69 827:13
1994 73 1135:36
1995 106 1315:15
1996 82 1503:39
1997 87 1460:20
1998 64 1162:42
1999 63 1225:50
2000 112 1031:40
2001 135 1273:17
2002 179 1125:31
2003 200 1253:15
2004 173 1065:05
2005 134 1106:54
2006 131 964:46
2007 166 1081:59
2008 157 1099:59
2009 183 1282:49
2010 79 1288:05
2011 121 1234:15
2012 91 1364:55
2013 83 1352:29
2014 169 1299:50
2015 179 1223:30
2016 191 1409:54
2017 59 524:40
2018 156 1539:51
2019 107 1131:19
2020 94 1214:00
2021 19 742:15
 
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