Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 4 27:20
1985 0 29:00
1986 40 69:40
1987 6 47:00
1988 0 17:30
1989 0 45:00
1990 10 35:00
1991 0 48:28
1992 48 45:00
1993 0 51:30
1994 0 27:30
1995 48 50:00
1996 0 49:15
1997 0 34:50
1998 6 50:00
1999 0 57:20
2000 0 42:30
2001 2 69:35
2002 26 76:40
2003 8 108:30
2004 11 111:45
2005 3 145:21
2006 1 152:17
2007 0 187:59
2008 0 132:42
2009 5 75:32
2010 21 236:16
2011 35 281:19
2012 11 394:00
2013 667 408:08
2014 97 481:30
2015 310 400:00
2016 12 467:00
2017 127 490:30
2018 268 442:30
2019 127 431:54
2020 0 66:00
 
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