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 34 791:25
1978 28 820:52
1979 13 934:10
1980 87 731:36
1981 25 944:01
1982 53 768:05
1983 67 673:25
1984 32 682:07
1985 55 775:03
1986 35 933:53
1987 80 1120:12
1988 73 1184:32
1989 38 1293:12
1990 38 944:40
1991 44 858:50
1992 26 759:26
1993 72 827:13
1994 77 1135:36
1995 32 1315:15
1996 48 1503:39
1997 55 1460:20
1998 58 1162:42
1999 49 1225:50
2000 60 1031:40
2001 82 1273:17
2002 44 1125:31
2003 89 1253:15
2004 86 1065:05
2005 58 1106:54
2006 38 964:46
2007 108 1081:59
2008 163 1099:59
2009 94 1282:49
2010 64 1288:05
2011 140 1234:15
2012 117 1364:55
2013 38 1352:29
2014 54 1299:50
2015 71 1223:30
2016 68 1409:54
2017 39 524:40
2018 26 1539:51
2019 36 1131:19
2020 44 1214:00
2021 12 482:15
 
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