Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1983 8 9:15
1984 3 27:20
1985 6 29:00
1986 11 69:40
1987 3 47:00
1988 14 17:30
1989 1 45:00
1990 29 35:00
1991 5 48:28
1992 36 45:00
1993 44 51:30
1994 20 27:30
1995 79 50:00
1996 26 49:15
1997 59 34:50
1998 24 50:00
1999 0 57:20
2000 22 42:30
2001 250 69:35
2002 90 76:40
2003 57 108:30
2004 37 111:45
2005 203 145:21
2006 64 152:17
2007 562 187:59
2008 131 132:42
2009 68 75:32
2010 643 236:16
2011 350 281:19
2012 1183 394:00
2013 473 408:08
2014 629 481:30
2015 488 400:00
2016 215 467:00
2017 532 490:30
2018 342 442:30
2019 1592 431:54
2020 602 374:00
 
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