Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 1 27:20
1985 0 29:00
1986 8 69:40
1987 8 47:00
1988 12 17:30
1989 6 45:00
1990 18 35:00
1991 7 48:28
1992 8 45:00
1993 26 51:30
1994 0 27:30
1995 48 50:00
1996 1 49:15
1997 24 34:50
1998 0 50:00
1999 7 57:20
2000 6 42:30
2001 10 69:35
2002 0 76:40
2003 4 108:30
2004 4 111:45
2005 22 145:21
2006 7 152:17
2007 8 187:59
2008 19 132:42
2009 0 75:32
2010 25 236:16
2011 7 281:19
2012 26 394:00
2013 9 408:08
2014 25 481:30
2015 2 400:00
2016 1 467:00
2017 26 490:30
2018 8 442:30
2019 27 431:54
2020 8 102:00
 
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