Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 5 9:15
1984 5 27:20
1985 1 29:00
1986 106 69:40
1987 58 47:00
1988 26 17:30
1989 50 45:00
1990 25 35:00
1991 29 48:28
1992 29 45:00
1993 17 51:30
1994 10 27:30
1995 18 50:00
1996 7 49:15
1997 28 34:50
1998 11 50:00
1999 25 57:20
2000 30 42:30
2001 57 69:35
2002 32 76:40
2003 38 108:30
2004 93 111:45
2005 110 145:21
2006 119 152:17
2007 119 187:59
2008 90 132:42
2009 29 75:32
2010 162 236:16
2011 273 281:19
2012 204 394:00
2013 241 408:08
2014 263 481:30
2015 102 400:00
2016 148 467:00
2017 192 490:30
2018 340 442:30
2019 357 431:54
2020 0 66:00
 
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