Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 1 27:20
1985 0 29:00
1986 91 69:40
1987 70 47:00
1988 135 17:30
1989 262 45:00
1990 210 35:00
1991 786 48:28
1992 748 45:00
1993 780 51:30
1994 3 27:30
1995 121 50:00
1996 30 49:15
1997 84 34:50
1998 106 50:00
1999 71 57:20
2000 4 42:30
2001 320 69:35
2002 526 76:40
2003 166 108:30
2004 76 111:45
2005 353 145:21
2006 342 152:17
2007 557 187:59
2008 232 132:42
2009 55 75:32
2010 130 236:16
2011 285 281:19
2012 215 394:00
2013 127 408:08
2014 159 481:30
2015 183 400:00
2016 343 467:00
2017 300 490:30
2018 147 442:30
2019 9 431:54
2020 0 66:00
 
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