Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1972 6 31:00
1973 2 18:15
1974 1 7:45
1975 0 18:30
1976 7 66:30
1977 2 23:45
1978 8 116:45
1979 3900 71:45
1980 2737 109:00
1981 256 78:00
1982 147 39:00
1983 348 71:00
1984 1 30:15
1985 2132 98:00
1986 52 41:30
1987 1070 42:15
1988 2003 55:00
1989 1590 47:15
1990 3 33:00
1991 1 18:00
1992 38 28:30
1993 16 25:45
1994 12 40:00
1995 23 15:15
1996 0 5:00
1997 121 26:30
1998 500 20:00
1999 31 26:45
2000 2 27:30
2001 77 23:00
2002 198 26:55
2003 350 37:45
2004 129 30:10
2005 607 34:00
2006 1508 41:33
2007 1335 83:14
2008 78 56:33
2009 439 76:07
2010 156 52:50
2011 396 80:30
2012 2003 94:05
2013 207 66:27
2014 353 41:10
2015 44 49:05
2016 15 19:00
2017 1470 123:39
2018 2818 89:34
2019 923 98:07
2020 4186 108:43
2021 83 3:00
 
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