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 278 791:25
1978 389 820:52
1979 430 934:10
1980 310 731:36
1981 348 944:01
1982 474 768:05
1983 307 673:25
1984 414 682:07
1985 545 775:03
1986 605 933:53
1987 445 1120:12
1988 325 1184:32
1989 386 1293:12
1990 196 944:40
1991 210 858:50
1992 99 759:26
1993 225 827:13
1994 118 1135:36
1995 309 1315:15
1996 330 1503:39
1997 172 1460:20
1998 100 1162:42
1999 219 1225:50
2000 81 1031:40
2001 103 1273:17
2002 38 1125:31
2003 106 1253:15
2004 56 1065:05
2005 109 1106:54
2006 68 964:46
2007 175 1081:59
2008 90 1099:59
2009 50 1282:49
2010 75 1288:05
2011 100 1234:15
2012 93 1364:55
2013 97 1352:29
2014 67 1299:50
2015 61 1223:30
2016 36 1409:54
2017 21 524:40
2018 91 1539:51
2019 60 1131:19
2020 101 1214:00
2021 48 1182:00
 
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