Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 3 27:20
1985 30 29:00
1986 13 69:40
1987 15 47:00
1988 1 17:30
1989 30 45:00
1990 18 35:00
1991 6 48:28
1992 14 45:00
1993 37 51:30
1994 7 27:30
1995 7 50:00
1996 14 49:15
1997 11 34:50
1998 7 50:00
1999 14 57:20
2000 18 42:30
2001 69 69:35
2002 76 76:40
2003 40 108:30
2004 43 111:45
2005 112 145:21
2006 74 152:17
2007 174 187:59
2008 59 132:42
2009 46 75:32
2010 151 236:16
2011 244 281:19
2012 469 394:00
2013 123 408:08
2014 592 481:30
2015 341 400:00
2016 393 467:00
2017 284 490:30
2018 416 442:30
2019 768 431:54
2020 1 66:00
 
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