Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 0 9:15
1984 14 27:20
1985 79 29:00
1986 43 69:40
1987 12 47:00
1988 7 17:30
1989 93 45:00
1990 17 35:00
1991 34 48:28
1992 29 45:00
1993 13 51:30
1994 6 27:30
1995 28 50:00
1996 24 49:15
1997 21 34:50
1998 8 50:00
1999 37 57:20
2000 48 42:30
2001 61 69:35
2002 77 76:40
2003 197 108:30
2004 97 111:45
2005 156 145:21
2006 188 152:17
2007 153 187:59
2008 78 132:42
2009 29 75:32
2010 216 236:16
2011 432 281:19
2012 603 394:00
2013 254 408:08
2014 658 481:30
2015 307 400:00
2016 596 467:00
2017 280 490:30
2018 1115 442:30
2019 1639 431:54
2020 114 102:00
 
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