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 0 45:00
1990 0 35:00
1991 0 48:28
1992 0 45:00
1993 0 51:30
1994 0 27:30
1995 0 50:00
1996 0 49:15
1997 0 34:50
1998 2 50:00
1999 0 57:20
2000 0 42:30
2001 0 69:35
2002 0 76:40
2003 0 108:30
2004 0 111:45
2005 0 145:21
2006 0 152:17
2007 0 187:59
2008 1 132:42
2009 0 75:32
2010 0 236:16
2011 0 281:19
2012 1 394:00
2013 0 408:08
2014 1 481:30
2015 0 400:00
2016 1 467:00
2017 0 490:30
2018 0 442:30
2019 4 431:54
2020 0 250:30
 
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