Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 1 27:20
1985 2 29:00
1986 11 69:40
1987 16 47:00
1988 12 17:30
1989 21 45:00
1990 12 35:00
1991 8 48:28
1992 8 45:00
1993 4 51:30
1994 6 27:30
1995 7 50:00
1996 10 49:15
1997 9 34:50
1998 5 50:00
1999 11 57:20
2000 18 42:30
2001 37 69:35
2002 37 76:40
2003 35 108:30
2004 73 111:45
2005 203 145:21
2006 42 152:17
2007 116 187:59
2008 55 132:42
2009 48 75:32
2010 56 236:16
2011 115 281:19
2012 117 394:00
2013 94 408:08
2014 136 481:30
2015 93 400:00
2016 31 467:00
2017 79 490:30
2018 164 442:30
2019 141 431:54
2020 2 88:30
 
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