Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 4 27:20
1985 7 29:00
1986 18 69:40
1987 79 47:00
1988 15 17:30
1989 11 45:00
1990 24 35:30
1991 38 48:28
1992 14 45:00
1993 13 51:30
1994 5 27:30
1995 27 50:00
1996 10 49:15
1997 2 34:50
1998 4 50:00
1999 10 57:20
2000 55 42:30
2001 183 69:35
2002 28 76:40
2003 11 108:30
2004 89 111:45
2005 117 145:21
2006 30 152:17
2007 54 187:59
2008 30 132:42
2009 14 75:32
2010 65 236:16
2011 140 281:19
2012 111 394:00
2013 87 408:08
2014 97 481:30
2015 46 400:00
2016 87 467:00
2017 15 490:30
2018 92 442:30
2019 95 431:54
2020 203 451:00
2021 96 379:30
 
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