Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 2 9:15
1984 5 27:20
1985 7 29:00
1986 7 69:40
1987 35 47:00
1988 6 17:30
1989 3 45:00
1990 17 35:00
1991 21 48:28
1992 6 45:00
1993 27 51:30
1994 19 27:30
1995 22 50:00
1996 17 49:15
1997 7 34:50
1998 46 50:00
1999 21 57:20
2000 25 42:30
2001 52 69:35
2002 53 76:40
2003 41 108:30
2004 43 111:45
2005 62 145:21
2006 162 152:17
2007 122 187:59
2008 63 132:42
2009 42 75:32
2010 166 236:16
2011 126 281:19
2012 201 394:00
2013 133 408:08
2014 222 481:30
2015 98 400:00
2016 139 467:00
2017 141 490:30
2018 220 442:30
2019 121 431:54
2020 110 396:30
 
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