Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 0 27:20
1985 2 29:00
1986 25 69:40
1987 10 47:00
1988 8 17:30
1989 2 45:00
1990 16 35:30
1991 1 48:28
1992 4 45:00
1993 0 51:30
1994 21 27:30
1995 8 50:00
1996 4 49:15
1997 2 34:50
1998 4 50:00
1999 31 57:20
2000 15 42:30
2001 8 69:35
2002 9 76:40
2003 3 108:30
2004 4 111:45
2005 34 145:21
2006 4 152:17
2007 25 187:59
2008 15 132:42
2009 12 75:32
2010 48 236:16
2011 16 281:19
2012 29 394:00
2013 20 408:08
2014 68 481:30
2015 93 400:00
2016 62 467:00
2017 89 490:30
2018 162 442:30
2019 152 431:54
2020 285 451:00
2021 106 315:30
 
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