Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 6 9:15
1984 20 27:20
1985 36 29:00
1986 46 69:40
1987 5 47:00
1988 0 17:30
1989 30 45:00
1990 11 35:00
1991 45 48:28
1992 43 45:00
1993 30 51:30
1994 13 27:30
1995 29 50:00
1996 63 49:15
1997 50 34:50
1998 11 50:00
1999 17 57:20
2000 10 42:30
2001 21 69:35
2002 275 76:40
2003 158 108:30
2004 98 111:45
2005 222 145:21
2006 157 152:17
2007 422 187:59
2008 158 132:42
2009 60 75:32
2010 583 236:16
2011 444 281:19
2012 2753 394:00
2013 1129 408:08
2014 890 481:30
2015 258 400:00
2016 134 467:00
2017 388 490:30
2018 855 442:30
2019 1069 431:54
2020 28 66:00
 
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