Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 9 9:15
1984 0 27:20
1985 27 29:00
1986 7 69:40
1987 19 47:00
1988 7 17:30
1989 8 45:00
1990 0 35:00
1991 1 48:28
1992 2 45:00
1993 2 51:30
1994 0 27:30
1995 22 50:00
1996 2 49:15
1997 0 34:50
1998 6 50:00
1999 5 57:20
2000 2 42:30
2001 20 69:35
2002 1 76:40
2003 13 108:30
2004 9 111:45
2005 7 145:21
2006 40 152:17
2007 2 187:59
2008 139 132:42
2009 7 75:32
2010 16 236:16
2011 12 281:19
2012 135 394:00
2013 82 408:08
2014 44 481:30
2015 185 400:00
2016 130 467:00
2017 142 490:30
2018 41 442:30
2019 25 431:54
2020 6 102:00
 
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