Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 0 27:20
1985 3 29:00
1986 2 69:40
1987 3 47:00
1988 1 17:30
1989 10 45:00
1990 7 35:30
1991 6 48:28
1992 2 45:00
1993 9 51:30
1994 0 27:30
1995 1 50:00
1996 4 49:15
1997 1 34:50
1998 2 50:00
1999 1 57:20
2000 1 42:30
2001 3 69:35
2002 1 76:40
2003 4 108:30
2004 3 111:45
2005 12 145:21
2006 9 152:17
2007 15 187:59
2008 6 132:42
2009 2 75:32
2010 7 236:16
2011 31 281:19
2012 18 394:00
2013 17 408:08
2014 33 481:30
2015 14 400:00
2016 22 467:00
2017 37 490:30
2018 30 442:30
2019 74 431:54
2020 68 451:00
2021 36 298:00
 
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