Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1972 4 31:00
1973 14 18:15
1974 0 7:45
1975 2 18:30
1976 73 66:30
1977 27 23:45
1978 66 116:45
1979 146 71:45
1980 107 109:00
1981 78 78:00
1982 71 39:00
1983 52 71:00
1984 57 30:15
1985 48 98:00
1986 12 41:30
1987 29 42:15
1988 5 55:00
1989 14 47:15
1990 37 33:00
1991 2 18:00
1992 61 28:30
1993 11 25:45
1994 26 40:00
1995 7 15:15
1996 34 5:00
1997 0 26:30
1998 0 20:00
1999 31 26:45
2000 36 27:30
2001 9 23:00
2002 17 26:55
2003 25 37:45
2004 17 30:10
2005 62 34:00
2006 17 41:33
2007 16 83:14
2008 159 56:33
2009 42 76:07
2010 67 52:50
2011 199 80:30
2012 147 94:05
2013 77 66:27
2014 22 41:10
2015 79 49:05
2016 40 19:00
2017 119 123:39
2018 154 89:34
2019 40 98:07
2020 207 108:43
2021 0 4:45
 
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