Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 0 27:20
1985 0 29:00
1986 0 69:40
1987 0 47:00
1988 0 17:30
1989 1 45:00
1990 0 35:00
1991 0 48:28
1992 1 45:00
1993 0 51:30
1994 0 27:30
1995 1 50:00
1996 0 49:15
1997 0 34:50
1998 0 50:00
1999 1 57:20
2000 1 42:30
2001 0 69:35
2002 0 76:40
2003 0 108:30
2004 0 111:45
2005 0 145:21
2006 4 152:17
2007 2 187:59
2008 1 132:42
2009 1 75:32
2010 5 236:16
2011 6 281:19
2012 10 394:00
2013 8 408:08
2014 17 481:30
2015 8 400:00
2016 8 467:00
2017 20 490:30
2018 10 442:30
2019 14 431:54
2020 0 66:00
 
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